A Multicenter, Open-label Study to Evaluate the Safety, Efficacy, Pharmacokinetics and Pharmacodynamics of M281 Administered to Pregnant Women at High Risk for Early Onset Severe Hemolytic Disease of the Fetus and Newborn (HDFN)
试验速览
- 阶段
- 2 期
- 状态
- 已完成
- 入组人数
- 25
- 试验地点
- 19
- 主要终点
- Number of Maternal Participants With Treatment-emergent Adverse Events (TEAEs)
研究概览
简要总结
The purpose of this study is to evaluate the safety in mother and neonate/infant of M281 administered to pregnant women who are at high risk for Early Onset Severe Hemolytic Disease of the Fetus and Newborn (EOS-HDFN). The effectiveness of the investigational drug M281 will be measured by looking at the percentage of participants with live birth at or after gestational age (GA) 32 weeks and without a need for an intrauterine transfusion (IUT) throughout their entire pregnancy.
研究设计
- 研究类型
- Interventional
- 分配方式
- Na
- 干预模型
- Single Group
- 主要目的
- Treatment
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 —（Adult, Older Adult）
- 性别
- Female
- 接受健康志愿者
- 否
入选标准
- •Approximately 15 eligible participants and their offspring will be enrolled
- •Each participant must meet all of the following criteria to be enrolled in the study:
- •Female and greater than or equal to (>=)18 years of age
- •Pregnant to an estimated gestational age of between 8 up to 14 weeks
- •A previous pregnancy with a gestation that included at least one of the following prior to week 24 gestation:
- •Severe fetal anemia, defined as hemoglobin less than or equal to (<=) 0.55 multiples of the median (MOM) for gestational age
- •Fetal hydrops with peak systolic velocity MOM >=1.5
- •Stillbirth with fetal or placental pathology indicative of hemolytic disease of the fetus and newborn (HDFN)
- •Maternal alloantibody titers for anti-D of >=32, or anti-Kell titers >=4
- •Free fetal deoxyribonucleic acid consistent with an antigen-positive fetus (blood sample taken from mother)
- •Maternal evidence for Immunity to measles mumps, rubella, and varicella, as documented by serologies performed during Screening. If initial serologies are borderline or negative, they may be repeated at a second lab. Alternatively, vaccination records can be used to support evidence of immunity.
- •Screening immunoglobulin G and albumin levels within the laboratory normal range for gestational age of pregnancy
- •Willing to receive standard of care with intrauterine transfusion if clinically indicated
- •Agree to receive recommended vaccinations per local standard of care for both mother and child throughout the course of the study
- •It is recommended that patients are up-to-date on age-appropriate vaccinations prior to screening as per routine local medical guidelines. For study patients who received locally-approved (and including emergency use-authorized) Coronavirus Disease 2019 (COVID-19) vaccines recently prior to study entry, follow applicable local vaccine labelling, guidelines, and standard of care for pregnant women receiving immune-targeted therapy when determining an appropriate interval between vaccination and study enrollment
排除标准
- •Currently pregnant with multiples (twins or more)
- •Pre-eclampsia In current pregnancy or history of pre-eclampsia in a previous pregnancy
- •Gestational hypertension in the current pregnancy
- •Current unstable hypertension
- •History of severe or recurrent pyelonephritis, 4 or more lower urinary tract infections in the past year or in a previous pregnancy
- •History of genital herpes infection
- •Active Infection at Screening or Baseline with Coxsackie, syphilis, cytomegalovirus, toxoplasmosis or herpes simplex 1 or 2, as evidenced by clinical signs and symptoms (evidence for prior Infection or exposure, but without clinical signs and symptoms of active infection is acceptable)
- •Active infection with tuberculosis as evidenced by positive QuantiFERON-tuberculosis testing
- •Requires treatment with corticosteroids or immunosuppression for disorders unrelated to the pregnancy (use of low-potency topical corticosteroids or intra-articular corticosteroids is permitted)
- •Has received or is expected to receive any live virus or bacterial vaccine within 12 weeks prior to screening or has a known need to receive a live vaccine while receiving nipocalimab, or within 12 weeks after the last administration of nipocalimab in the study or has received Bacille Calmett-Guérin (BCG) vaccine within 1 year prior to the first administration of nipocalimab
- •Currently receiving an antibody-based drug or an Fc-fusion protein drug
- •Received plasmapheresis and/or intravenous immunoglobulin during the current pregnancy for treatment of HDFN
- •COVID-19 infection: during the 6 weeks prior to baseline (regardless of vaccination status), have had any of: a) confirmed severe acute respiratory syndrome coronavirus(-2) (SARS-CoV-2) (COVID-19) infection (test positive), or; b) suspected SARS-CoV-2 infection (clinical features without documented test results), or; c) close contact with a person with known or suspected SARS-CoV-2 infection. Exception: may be included with a documented negative result for a validated SARSCoV-2 test: obtained at least 2 weeks after conditions a), b), c) above (timed from resolution of key clinical features if present, example fever, cough, dyspnea) and; with absence of all conditions a), b), c) above during the period between the negative test result and the baseline study visit
研究组 & 干预措施
M281
干预措施: M281 (Drug)
结局指标
主要结局
Number of Maternal Participants With Treatment-emergent Adverse Events (TEAEs)
时间窗: From baseline (Gestational Age [GA] Week 14) up to Postpartum (PP) Week 24 (up to 50 weeks)
An AE was any unfavorable and unintended sign (example, an abnormal laboratory finding), symptom, or disease temporally associated with the use of a drug, without any judgment about causality. TEAE was defined as any event occurring after the initiation of the first infusion of nipocalimab.
Number of Neonates/Infants With Adverse Events (AEs)
时间窗: From Birth (PP Day 0) up to PP Week 96
An AE was any unfavorable and unintended sign (example, an abnormal laboratory finding), symptom, or disease temporally associated with the use of a drug, without any judgment about causality.
Number of Maternal Participants With Treatment-emergent Serious Adverse Events (TESAEs)
时间窗: From baseline (Gestational Age [GA] Week 14) up to PP Week 24 (up to 50 weeks)
SAE was defined as any untoward medical occurrence that resulted in death, a life-threatening AE, inpatient hospitalization or prolongation of existing hospitalization, a persistent or significant incapacity or substantial disruption of the ability to conduct normal life functions, or a congenital anomaly/birth defect. An AE was any unfavorable and unintended sign (example, an abnormal laboratory finding), symptom, or disease temporally associated with the use of a drug, without any judgment about causality. TESAEs were any SAEs occurring after the initiation of the first infusion of nipocalimab.
Number of Neonates/Infants With Serious Adverse Events (SAEs)
时间窗: From Birth (PP Day 0) up to PP Week 96
SAE was defined as any untoward medical occurrence that resulted in death, a life-threatening AE, inpatient hospitalization or prolongation of existing hospitalization, a persistent or significant incapacity or substantial disruption of the ability to conduct normal life functions, or a congenital anomaly/birth defect. An AE was any unfavorable and unintended sign (example, an abnormal laboratory finding), symptom, or disease temporally associated with the use of a drug, without any judgment about causality.
Number of Maternal Participants With Treatment-emergent Adverse Events of Special Interest (TEAESIs)
时间窗: From baseline (Gestational Age [GA] Week 14) up to PP Week 24 (up to 50 weeks)
Number of maternal participants with TEAESIs were reported. An AE was any unfavorable and unintended sign (example, an abnormal laboratory finding), symptom, or disease temporally associated with the use of a drug, without any judgment about causality. All infections requiring anti-infective (that is, oral or intravenous antibacterial, antiviral, or antifungal) treatment and with hypoalbuminemia greater than or equal to (\>=) Grade 3 (less than \[\<\]20 gram per liter \[g/L\] by National Cancer Institute of Common Terminology Criteria for Adverse Events (NCI CTCAE) Version 5.0 criteria were considered an AESI for maternal participants. TEAE was defined as any event occurring after the initiation of the first infusion of nipocalimab.
Number of Neonates/Infants With Adverse Events of Special Interest (AESIs)
时间窗: From birth (PP Day 0) up to PP Week 96
Number of neonates/infants with TEAESIs were reported. An AE was any unfavorable and unintended sign (example, an abnormal laboratory finding), symptom, or disease temporally associated with the use of a drug, without any judgment about causality. All infections requiring anti-infective (that is, oral or intravenous antibacterial, antiviral, or antifungal) treatment, unexpected/unusual childhood illnesses and Immunoglobulin G (IgG) concentrations \<200 milligrams per deciliter (mg/dL) at Week 24 through Week 47 or \<300 mg/dL at Week 48 through Week 96 were considered an AESI for neonates and infants.
Maternal Participants: Absolute Value of Electrocardiogram (ECG) Parameter - Mean Ventricular Rate at Baseline
时间窗: Baseline (GA Week 14)
Absolute value of ECG parameter - mean ventricular rate at baseline in maternal participants was reported. Electrocardiogram assessments included comments on whether the tracings were normal or abnormal, rhythm, presence of arrhythmia or conduction defects, morphology, any evidence of myocardial infarction, or ST segment, T Wave, and U Wave abnormalities.
Maternal Participants: Absolute Value of Electrocardiogram (ECG) Parameter - Mean Ventricular Rate at GA Week 36
时间窗: GA Week 36
Absolute value of ECG parameter - mean ventricular rate at GA Week 36 in maternal participants was reported. Electrocardiogram assessments included comments on whether the tracings were normal or abnormal, rhythm, presence of arrhythmia or conduction defects, morphology, any evidence of myocardial infarction, or ST segment, T Wave, and U Wave abnormalities.
Maternal Participants: Change From Baseline in ECG Parameter- Mean Ventricular Rate
时间窗: Baseline (GA Week 14) and GA Week 36
Change from baseline in ECG parameter- mean ventricular rate in maternal participants was reported. Electrocardiogram assessments included comments on whether the tracings were normal or abnormal, rhythm, presence of arrhythmia or conduction defects, morphology, any evidence of myocardial infarction, or ST segment, T Wave, and U Wave abnormalities.
Number of Maternal Participants With Treatment-emergent (TE) Clinically Important Laboratory and Biomarker Immunoglobulin G (IgG) Values Over Time
时间窗: From baseline (Gestational Age [GA] Week 14) up to PP Week 24 (up to 50 weeks)
Laboratory parameters included hematology, chemistry, blood Lipids panel, and Immunoglobulin G (IgG) parameters. TEAE was defined as any event occurring after the initiation of the first infusion of nipocalimab. Here, HDL: high-density lipoprotein, LDL: low-density lipoprotein. The during-pregnancy value of albumin \<20 g/L was from a local laboratory and was \>=20 g/L when analyzed at the central laboratory for the same time point.
Number of Neonates or Infants With Clinically Important Laboratory and Biomarker Immunoglobulin G (IgG) Values Over Time
时间窗: From Birth (PP Day 0) up to PP Week 96
Laboratory parameters included total bilirubin and biomarker included immunoglobulin G (IgG).
Maternal Participants: Absolute Value of Vital Signs - Body Temperature at Baseline
时间窗: Baseline (GA Week 14)
Absolute value of vital signs - body temperature at baseline in maternal participants was reported.
Maternal Participants: Absolute Value of Vital Signs - Body Temperature at GA Week 36
时间窗: GA Week 36
Absolute value of vital signs - body temperature at GA Week 36 in maternal participants was reported.
Maternal Participants: Absolute Value of Vital Signs - Body Temperature at PP Week 24
时间窗: PP Week 24
Absolute value of vital signs - body temperature at PP Week 24 in maternal participants was reported.
Maternal Participants: Change From Baseline in Vital Sign - Body Temperature
时间窗: Baseline (GA Week 14), GA Week 36, and PP Week 24
Change from baseline in vital signs- body temperature in maternal participants was reported.
Maternal Participants: Absolute Value of Vital Signs - Respiratory Rate at Baseline
时间窗: Baseline (GA Week 14)
Absolute value of vital signs -respiratory rate at baseline in maternal participants was reported.
Maternal Participants: Absolute Value of Vital Signs - Respiratory Rate at GA Week 36
时间窗: GA Week 36
Absolute value of vital signs -respiratory rate at GA Week 36 in maternal participants was reported.
Maternal Participants: Absolute Value of Vital Signs - Respiratory Rate at PP Week 24
时间窗: PP Week 24
Absolute value of vital signs - respiratory rate at PP Week 24 in maternal participants was reported.
Maternal Participants: Change From Baseline in Vital Sign - Respiratory Rate
时间窗: Baseline (GA Week 14), GA Week 36, and PP Week 24
Change from baseline in vital signs- respiratory rate in maternal participants was reported.
Maternal Participants: Absolute Value of Vital Signs - Pulse Rate at Baseline
时间窗: Baseline (GA Week 14)
Absolute value of vital signs - pulse rate at baseline in maternal participants was reported.
Maternal Participants: Absolute Value of Vital Signs - Pulse Rate at GA Week 36
时间窗: GA Week 36
Absolute value of vital signs -pulse rate at GA Week 36 in maternal participants was reported.
Maternal Participants: Absolute Value of Vital Signs -Pulse Rate at PP Week 24
时间窗: PP Week 24
Absolute value of vital signs -pulse rate at PP Week 24 in maternal participants was reported.
Maternal Participants: Change From Baseline in Vital Sign - Pulse Rate
时间窗: Baseline (GA Week 14), GA Week 36, and PP Week 24
Change from baseline in vital signs -pulse rate in maternal participants was reported.
Maternal Participants: Absolute Value of Vital Signs - Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP) at Baseline
时间窗: Baseline (GA Week 14)
Absolute value of vital signs - SBP and DBP at baseline in maternal participants was reported.
Maternal Participants: Absolute Value of Vital Signs - Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP) at GA Week 36
时间窗: GA Week 36
Absolute value of vital signs -SBP and DBP at GA Week 36 in maternal participants was reported.
Maternal Participants: Absolute Value of Vital Signs - Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP) at PP Week 24
时间窗: PP Week 24
Absolute value of vital signs - SBP and DBP at PP Week 24 in maternal participants was reported.
Maternal Participants: Change From Baseline in Vital Sign - Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)
时间窗: Baseline (GA Week 14), GA Week 36, and PP Week 24
Change from baseline in vital signs -SBP and DBP in maternal participants were reported.
Maternal Participants: Absolute Value of Vital Signs - Body Weight at Baseline
时间窗: Baseline (GA Week 14)
Absolute value of vital signs - body weight at baseline in maternal participants was reported.
Maternal Participants: Absolute Value of Vital Signs - Body Weight at GA Week 36
时间窗: GA Week 36
Absolute value of vital signs -body weight at GA Week 36 in maternal participants was reported.
Maternal Participants: Absolute Value of Vital Signs - Body Weight at PP Week 24
时间窗: PP Week 24
Absolute value of vital signs included body weight at PP Week 24 in maternal participants was reported.
Maternal Participants: Change From Baseline in Vital Sign - Body Weight
时间窗: Baseline (GA Week 14), GA Week 36, and PP Week 24
Change from baseline in vital signs- body weight in maternal participants was reported.
Neonates/Infants: Absolute Value in Vital Signs - Body Temperature at Baseline
时间窗: Baseline (PP Day 0)
Absolute value in vital signs parameter -body temperature at baseline was reported for all neonates/infants.
Neonates/Infants: Absolute Value of Vital Signs - Body Temperature at PP Week 1
时间窗: PP Week 1
Absolute value of vital signs parameter -body temperature at PP Week 1 was reported for all neonates/infants.
Neonates/Infants: Absolute Value in Vital Signs - Body Temperature at PP Week 4
时间窗: PP Week 4
Absolute value in vital signs parameter - body temperature at PP Week 4 was reported for all neonates/infants.
Neonates/Infants: Absolute Value in Vital Signs - Body Temperature at PP Week 24
时间窗: PP Week 24
Absolute value in vital signs parameter -body temperature at PP Week 24 was reported for all neonates/infants.
Neonates/Infants: Change From Baseline in Vital Signs - Body Temperature
时间窗: Baseline (PP Day 0), PP Weeks 1, 4, and 24
Change from baseline in vital signs- body temperature were reported for all neonates/infants.
Neonates/Infants: Absolute Value of Vital Signs - Body Weight at Baseline
时间窗: Baseline (PP Day 0)
Absolute value of vital signs parameter- body weight at baseline was reported for all neonates/infants.
Neonates/Infants: Absolute Value of Vital Signs - Body Weight at PP Week 1
时间窗: PP Week 1
Absolute value of vital signs parameter - body weight at PP Week 1 was reported for all neonates/infants.
Neonates/Infants: Absolute Value of Vital Signs - Body Weight at PP Week 4
时间窗: PP Week 4
Absolute value of vital signs parameter - body weight at PP Week 4 was reported for all neonates/infants.
Neonates/Infants: Absolute Value of Vital Signs - Body Weight at PP Week 24
时间窗: PP Week 24
Absolute value of vital signs parameter - body weight at PP Week 24 was reported for all neonates/infants.
Neonates/Infants: Change From Baseline in Vital Signs -Body Weight
时间窗: Baseline (PP Day 0), PP Weeks 1, 4, and 24
Change from baseline in vital signs - body weight were reported for all neonates/infants.
Neonates/Infants: Absolute Value of Vital Signs - Respiratory Rate at Baseline
时间窗: Baseline (PP Day 0)
Absolute value of vital signs parameter -respiratory rate at baseline was reported for all neonates/infants.
Neonates/Infants: Absolute Value of Vital Signs - Respiratory Rate at PP Week 1
时间窗: PP Week 1
Absolute value of vital signs parameter - respiratory rate at PP Week 1 was reported for all neonates/infants.
Neonates/Infants: Absolute Value of Vital Signs - Respiratory Rate at PP Week 4
时间窗: PP Week 4
Absolute value of vital signs parameter - respiratory rate at PP Week 4 was reported for all neonates/infants.
Neonates/Infants: Absolute Value of Vital Signs - Respiratory Rate at PP Week 24
时间窗: PP Week 24
Absolute value of vital signs parameter- respiratory rate at PP Week 24 was reported for all neonates/infants.
Neonates/Infants: Change From Baseline in Vital Signs - Respiratory Rate
时间窗: Baseline (PP Day 0), PP Weeks 1, 4, and 24
Change from baseline in vital signs -respiratory rate was reported for all neonates/infants.
Neonates/Infants: Absolute Value of Vital Sign - Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP) at Baseline
时间窗: Baseline (PP Day 0)
Absolute value of vital signs parameter - SBP and DBP at baseline were reported for all neonates/infants.
Neonates/Infants: Absolute Value of Vital Sign - Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP) at PP Week 1
时间窗: PP Week 1
Absolute value of vital signs parameter - SBP and DBP at PP Week 1 were reported for all neonates/infants.
Neonates/Infants: Absolute Value of Vital Sign - Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP) at PP Week 4
时间窗: PP Week 4
Absolute value of vital signs parameter -SBP and DBP at PP Week 4 were reported for all neonates/infants.
Neonates/Infants: Absolute Value of Vital Sign - Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP) at PP Week 24
时间窗: PP Week 24
Absolute value of vital signs parameter -SBP and DBP at PP Week 24 were reported for all neonates/infants.
Neonates/Infants: Change From Baseline in Vital Signs - Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)
时间窗: Baseline (PP Day 0), PP Weeks 1, 4, and 24
Change from baseline in vital signs- SBP and DBP were reported for all neonates/infants.
Percentage of Maternal Participants With Intrauterine Growth Restriction (IUGR) Based on Ultrasound Assessments
时间窗: Baseline (GA Week 14), GA Weeks 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, and 36
Percentage of maternal participants with intrauterine growth restriction (IUGR) based on ultrasound assessments and guidelines from American College of Obstetricians and Gynecologists, and Society for Maternal-Fetal Medicine was reported. This outcome measure provided the incidence of with IUGR at delivery. IUGR is defined as weight below the 10th percentile for gestational age based on the World Health Organization (WHO) fetal growth curve.
Percentage of Maternal Participants With Abnormal Amniotic Fluid Values: Amniotic Fluid Index (AFI) at Baseline
时间窗: Baseline (GA Week 14)
Percentage of maternal participants with abnormal amniotic fluid values: amniotic fluid index (AFI) at baseline was reported. The amniotic fluid volume abnormality was categorized as an AFI \<5 centimeter (cm) or \>24 cm.
Percentage of Maternal Participants With Abnormal Amniotic Fluid Values: AFI at GA Week 26
时间窗: GA Week 26
Percentage of maternal participants with abnormal amniotic fluid values: AFI at GA Week 26 was reported. The amniotic fluid volume abnormality was categorized as an AFI \<5 cm or \>24 cm.
Percentage of Maternal Participants With Abnormal Amniotic Fluid Values: AFI at GA Week 36
时间窗: GA Week 36
Percentage of maternal participants with abnormal amniotic fluid values: AFI at GA Week 36 was reported. The amniotic fluid volume abnormality was categorized as an AFI \<5 cm or \>24 cm.
Percentage of Maternal Participants With Abnormal Amniotic Fluid Values: Maximum Vertical Pocket (MVP) at Baseline
时间窗: From Baseline (GA Week 14)
Percentage of maternal participants with abnormal amniotic fluid values: maximum vertical pocket (MVP) at baseline was reported. The amniotic fluid volume abnormality was categorized as MVP \<2 cm or \>8 cm.
Percentage of Maternal Participants With Abnormal Amniotic Fluid Values: MVP at GA Week 18
时间窗: GA Week 18
Percentage of maternal participants with abnormal amniotic fluid values: MVP at GA Week 18 was reported. The amniotic fluid volume abnormality was categorized as MVP \<2 cm or \>8 cm.
Percentage of Maternal Participants With Abnormal Amniotic Fluid Values: MVP at GA Week 22
时间窗: GA Week 22
Percentage of maternal participants with abnormal amniotic fluid values: MVP at GA Week 22 was reported. The amniotic fluid volume abnormality was categorized as MVP \<2 cm or \>8 cm.
Number of Neonates/Infants With Appearance, Pulse, Grimace Response, Activity, Respiration (Apgar) Score
时间窗: 1, 5, and 10 minutes after birth at PP Day 0
Number of neonates/infants with Apgar score from 1 to 10 minutes of life were reported. The system provided a standardized assessment for infants after delivery. The Apgar score comprises five components: 1) color, 2) heart rate, 3) reflexes, 4) muscle tone, and 5) respiration, each of which is given a score of 0, 1, or 2. The score is reported at 1 minute and 5 minutes after birth for all infants, and at 5-minute intervals thereafter until 20 minutes for infants with a score less than 7. This is using an Apgar scale which ranges from minimum total score of 0 and maximum total score of 10, with higher score representing a better outcome.
Number of Maternal Participants With Concomitant Medications and Therapies
时间窗: From baseline (Gestational Age [GA] Week 14) up to PP Week 24 (up to 50 weeks)
Number of maternal participants with concomitant medications and therapies were reported.
Number of Neonates/Infants With Concomitant Medications and Therapies
时间窗: From birth (PP Day 0) up to PP Week 96
Number of neonates/infants with concomitant medications and therapies were reported.
Percentage of Maternal Participants With Live Birth at or After Gestational Age (GA) Week 32 and Without an Intrauterine Transfusion (IUT) Throughout Their Entire Pregnancies
时间窗: From baseline (GA Week 14) up to GA Week 37
Percentage of maternal participants with live birth at or after GA Week 32 and without an IUT throughout their entire pregnancies were reported.
次要结局
- Percentage of Maternal Participants With Live Birth(From baseline (GA Week 14) up to GA Week 37)
- Percentage of Maternal Participants Without an Intrauterine Transfusion (IUT) Before Gestational Age (GA) Week 24(From baseline (GA Week 14) up to GA Week 24)
- Maternal Participants : Gestational Age (GA) at First Intrauterine Transfusion (IUT)(From baseline (GA Week 14) up to GA Week 37)
- Median Number of Intrauterine Transfusion (IUT) Per Maternal Participant(From baseline (GA Week 14) up to GA Week 37)
- Frequency of Intrauterine Transfusions (IUTs) on Maternal Participants(From baseline (GA Week 14) up to GA Week 37)
- Percentage of Maternal Participants With Fetal Hydrops in Utero or Post Birth(From baseline (Gestational Age [GA] Week 14) up to PP Week 24 (up to 50 weeks))
- Maternal Participants: Gestational Age at Time of Delivery(From baseline (GA Week 14) up to GA Week 37)
- Percentage of Neonates Who Required Phototherapy(From birth (PP Day 0) up to PP Week 24)
- Percentage of Neonates Who Required Exchange Transfusions(From birth (PP Day 0) up to PP Week 24)
- Duration of Postnatal Phototherapy Required by Neonates(From birth (PP Day 0) up to PP Week 24)
- Percentage of Neonates Who Required Simple Transfusions in the First 12 Weeks of Life(From birth (PP Day 0) up to PP Week 12)
- Number of Simple Transfusions Required by Neonate in the First 12 Weeks of Life(From birth (PP Day 0) up to PP Week 12)
- Maternal Serum Unoccupied Neonatal Concentration of Participants Fc Receptor [FcRn] Receptor Occupancy (RO) in Monocytes by Nipocalimab(Baseline (GA Week 14), GA Week 16, GA Week 36, PP Day 0, PP Week 4, and PP Week 24)
- Serum Unoccupied Concentration of Participants Fc Receptor [FcRn] Receptor Occupancy (RO) in Monocytes of Neonate by Nipocalimab(From birth (PP Day 0) up to PP Week 24)
- Maternal Participants: Change From Baseline in Serum Concentration of Total Immunoglobulin G (IgG) and Subclasses (IgG1, IgG2, IgG3, IgG4), IgA, IgM, and IgE(IgG: Baseline (GA Week 14), GA Week 16, GA Week 36, birth (PP Day 0), PP Week 4, and PP Week 24; IgG1, IgG2, IgG3, IgG4, IgA, IgM, and IgE: baseline (GA Week 14), GA Week 36)
- Neonates/Infants: Change From Baseline in Serum Concentration of Total IgG, IgA, IgM, and IgE(Baseline (PP Day 0), PP Weeks 4, 24, 96)
- Serum Concentrations of Nipocalimab in Maternal Participants(Pre dose and post dose: GA Week 14 and GA Week 24; Birth (PP Day 0), PP Week 4 and PP Week 24)
- Pediatric Quality of Life Inventory (PedsQL) Total and Sub Scale Score in Neonates/Infants(PP Week 96)
- Ages and Stages Questionnaires, Third Edition (ASQ-3) Total Domain Score in Neonates/Infants(At PP 6 month, PP 12 month, and PP 24 month)