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Although a positive correlation between aneuploidy and maternal age was first reported almost a century ago, the underlying mechanisms remain mostly unknown. Different hypotheses regarding age-related...
Background: Brazil has witnessed dramatic changes in its fertility patterns in recent decades. The decline to below-replacement fertility has been accompanied by increases in the proportion of childre...
The observation that more boys were born than girls was noted in the late 1660’s. Recent studies suggest the secondary sex ratio (SSR) is declining in industrialized countries. SSR is proposed as a se...
The article presents a study on the effectiveness of the embryo banking with preimplantation genetic screening (PGS) for women with advanced maternal age (AMA) in the U.S. The study intends to determi...
Reproductive behavior of 1525 pregnant woman were studied in the time of termination of pregnancy in relation to maternal age, education, prenatal care and the number of previous pregnancies. The resu...
A descriptive prospective study was undertaken to determine birth weight, length and head circumference of live births and to examine the effect of maternal age, parity and gestational age on birth si...

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