No “masculinization” effect of a male on birth weight of its female co-twin
-
Nataša Tul
Abstract
Objective: To test the hypothesis that the presence of a male affects birth weight of its female co-twin.
Patients and methods: We evaluated a large population dataset of bichorionic twins after exclusion of potential confounders and after controlling for parity and gestational age. We tested the hypotheses that males (M) are heavier than females (F) irrespective of gender mix, parity and gestational age, and the hypothesis that birth weight of twins might be influenced by the gender of the co-twin.
Results : There were 819 MM pairs, 777 FF pairs and 1097 MF sets, for a total of 2735 males and 2651 female twins. Male twins were heavier than female twins, irrespective of parity or gestational age; twins born to multiparas were heavier than twins born to nulliparas, except for very preterm births (≤32 weeks); males from MF pairs were heavier than males from MM pairs, but the mean birth weight of females from MF was not different from that of females from FF sets suggesting no “masculinization” effect of the male on birth weight of its female co-twin, irrespective of parity and gestational age.
Conclusions: After exclusion of potential confounders and controlling for chorionicity, parity, and gestational age, our data do not support the presence of a “masculinization” effect on birth weight.
©2012 by Walter de Gruyter Berlin Boston
Articles in the same Issue
- Review Article
- Retinal microvascular changes in low-birth-weight babies have a link to future health
- Original Articles – Obstetrics
- Chromosomal mosaicisms in prenatal diagnosis: correlation with first trimester screening and clinical outcome
- Perinatal impact of the use of metformin and glyburide for the treatment of gestational diabetes mellitus
- Incidence and causes of maternal thrombocytopenia in triplet gestation
- Maternal and paternal age and twinning in the United States, 2004–2008
- Correlates of the trend of cesarean section rates in twin pregnancies
- Prospective risk of stillbirth: monochorionic diamniotic twins vs. dichorionic twins
- Association between increased yolk sac diameter and abnormal karyotypes
- No “masculinization” effect of a male on birth weight of its female co-twin
- Comparison of risk calculation approaches in a screening programme for Down syndrome
- Individual decisions in placenta increta and percreta: a case series
- Original Articles – Fetus
- Fetal sex and perinatal outcomes
- Fetal magnetocardiography (fMCG): moving forward in the establishment of clinical reference data by advanced biomagnetic instrumentation and analysis
- Maternal and fetal cord blood lipids in intrauterine growth restriction
- Assessment of long-axis ventricular function in the fetal heart with a tissue-tracking algorithm
- Original Articles – Newborn
- A cluster of methicillin-sensitive Staphylococcus aureus colonization in a nursery
- Intermittent flushing improves cannula patency compared to continuous infusion for peripherally inserted venous catheters in newborns: results from a prospective observational study
- Opinion Paper
- Cross-over training in neonatology and obstetrics
- Congress Calender
- Congress Calendar
- Masthead
- Masthead
Articles in the same Issue
- Review Article
- Retinal microvascular changes in low-birth-weight babies have a link to future health
- Original Articles – Obstetrics
- Chromosomal mosaicisms in prenatal diagnosis: correlation with first trimester screening and clinical outcome
- Perinatal impact of the use of metformin and glyburide for the treatment of gestational diabetes mellitus
- Incidence and causes of maternal thrombocytopenia in triplet gestation
- Maternal and paternal age and twinning in the United States, 2004–2008
- Correlates of the trend of cesarean section rates in twin pregnancies
- Prospective risk of stillbirth: monochorionic diamniotic twins vs. dichorionic twins
- Association between increased yolk sac diameter and abnormal karyotypes
- No “masculinization” effect of a male on birth weight of its female co-twin
- Comparison of risk calculation approaches in a screening programme for Down syndrome
- Individual decisions in placenta increta and percreta: a case series
- Original Articles – Fetus
- Fetal sex and perinatal outcomes
- Fetal magnetocardiography (fMCG): moving forward in the establishment of clinical reference data by advanced biomagnetic instrumentation and analysis
- Maternal and fetal cord blood lipids in intrauterine growth restriction
- Assessment of long-axis ventricular function in the fetal heart with a tissue-tracking algorithm
- Original Articles – Newborn
- A cluster of methicillin-sensitive Staphylococcus aureus colonization in a nursery
- Intermittent flushing improves cannula patency compared to continuous infusion for peripherally inserted venous catheters in newborns: results from a prospective observational study
- Opinion Paper
- Cross-over training in neonatology and obstetrics
- Congress Calender
- Congress Calendar
- Masthead
- Masthead
