نتایج جستجو برای: fetal sex determination
تعداد نتایج: 535169 فیلتر نتایج به سال:
BACKGROUND/OBJECTIVES It is possible that not all women would want the disclosure of fetal gender by the sonologist during a prenatal scan. The objectives of this study were to determine the proportion of women who do not want fetal gender disclosure at the time of prenatal ultrasonography and document their reasons. METHOD A cross-sectional survey of women that were 20 weeks or more pregnant...
Traditional gene targeting methods in mice are complex and time consuming, especially when conditional deletion methods are required. Here, we describe a novel technique for assessing gene function by injection of modified antisense morpholino oligonucleotides (MOs) into the heart of mid-gestation mouse embryos. After allowing MOs to circulate through the embryonic vasculature, target tissues w...
Decreasing male fertility has been observed for the past fifty years. Examples of affected reproductive parameters include decreases in sperm count and sperm quality and increases in testicular cancer, cryptorchidism and hypospadias. Exposures to environmental toxicants during fetal development and early postnatal life have been shown to promote infertility. Environmental exposures inducing epi...
Sex determination of mammalian germ cells occurs during fetal development and depends on signals from gonadal somatic cells. Previous studies have established that retinoic acid (RA) triggers ovarian germ cells to enter meiosis and thereby commit to oogenesis, whereas in the developing testis, the enzyme CYP26B1 degrades RA and germ cells are not induced to enter meiosis. Using in vitro and in ...
Prenatal sex determination in suspicious cases of X-linked recessive diseases by the amelogenin gene
OBJECTIVE(S) To determine the fetal discernment in suspected cases of sex linked recessive disease in the first trimester of pregnancy. MATERIALS AND METHODS After collection of 100 Chorionic Villi samples, the DNAs were extracted and baby gender was determined. Meanwhile, after increasing the sensitivity, the system was able to detect the sex of each cell which was obtained by biopsy. RESU...
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