Maternal RhD heterozygous genotype is associated with male biased secondary sex ratio
نویسندگان
چکیده
منابع مشابه
Maternal lead exposure and the secondary sex ratio.
BACKGROUND A reduction in the secondary sex ratio may be associated with exposure to environmental toxicants. Little data exists relating this outcome to lead exposure, a well-known reproductive toxicant. METHODS We studied 1980 women having singleton births from 1994 to 1995 and from 1997 to 2001 who participated in a cohort study of lead exposure and infant outcomes in Mexico City. Levels o...
متن کاملBlastocyst embryo transfer is associated with a sex-ratio imbalance in favor of male offspring.
OBJECTIVE To evaluate the sex ratio of offspring born after blastocyst transfers. DESIGN Retrospective data analysis. SETTING A large assisted reproductive technology center. PATIENT(S) We included 1,284 offspring from 937 deliveries during the period August 2003-August 2005. INTERVENTION(S) Tabulation and statistical analysis of all births resulting from fresh IVF cycles. The sex of re...
متن کاملPersistence of an extreme male-biased adult sex ratio in a natural population of polyandrous bird.
In a number of insects, fishes and birds, the conventional sex roles are reversed: males are the main care provider, whereas females focus on matings. The reversal of typical sex roles is an evolutionary puzzle, because it challenges the foundations of sex roles, sexual selection and parental investment theory. Recent theoretical models predict that biased parental care may be a response to bia...
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Sperm competition risk and intensity can select for adaptations that increase male fertilisation success. Evolutionary responses are examined typically by generating increased strength of sexual selection via direct manipulation of female mating rates (by enforcing monandry or polyandry) or by alteration of adult sex ratios. Despite being a model species for sexual selection research, the effec...
متن کاملFetal RHD genotype detection from circulating cell-free fetal DNA in maternal plasma in non-sensitized RhD negative women.
OBJECTIVE To examine the performance of the SensiGene Fetal RHD Genotyping Laboratory Developed Test (RHD Genotyping LDT) using circulating cell-free fetal DNA (ccff DNA) extracted from maternal plasma. METHODS ccff DNA was extracted from maternal blood from non-sensitized women with singleton pregnancies in two cohorts, one with a serotype reference (11-13 weeks' gestation) and one with the ...
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ژورنال
عنوان ژورنال: Early Human Development
سال: 2020
ISSN: 0378-3782
DOI: 10.1016/j.earlhumdev.2019.104864