Harvard study finds that chemical that mimics female sex organ is linked to lower sperm counts
... total removal of the external female genitalia or other injury to the female genital organs for non-medical ... because her husband could not penetrate [during sex] – so he had brought a knife and cut ...
... Wnt4, or another secreted protein, called R-spondin1, experienced a partial female-to-male ... R-spondin1 genes had similar malformations of the sex organs.
Other studies had indicated that beta-catenin ...
... differences between individuals in a given population. Such differences, which include variations in male-to-female sex ratios as well as size or behavioral variations between individuals that can ...
... Washington in Seattle (USA) in an editorial in The Lancet. However, a recommendation to transplant only same-sex organs is not yet appropriate, because long-term success is good even if the donor and ...
... 60s, were significantly more likely to give birth to female children. Similar exposure is thought to have occurred ... strongest evidence to date that PCBs affect sex ratio in human children.
Irva Hertz ...
... Thompson Institute.
The researchers set out to identify the sex pheromone that attracts male C. elegans ... species has no females). C. elegans, a tiny nematode, is a model organism often used to study ...
... are either male or hermaphrodite — meaning they feature both male and female reproductive organs — and to pinpoint how they communicate, UF researchers and their collaborators isolated the chemicals ...
Olympic organizers have set up a sex-determination laboratory to evaluate the external appearance, hormones and genes of “suspect” female athletes.
... led to believe, variation in male copulatory organ size within species tends to be very ... females. Under these circumstances, reduced investment in horns seems to result in larger copulatory organs. ...
... alone," the authors write. Several professional organizations have jointly published guidelines for PCI, which call for ... stress testing prior to elective PCI.
Female sex, age of 85 years or older, ...
... 77 percent of male recipients and 51 percent of female recipients). Twenty-five percent of patients ... recommend that patients wait longer for a same-sex organ," Weiss said. "Clearly receiving a heart ...
... limited brood pouch space. So females compete for access to available males, and thus ... pregnancy also results in a reversal in sex-related behaviors, Jones said. “Females exhibit a competitive behavior ...
... egg-layers; yet like other mammals the female platypus feeds her newborn with milk, ... given its great power to enable individual organisms, and thereby the species, to regulate their systems and protect ...
... , described this week in the journal Science, could take the sex out of sexual reproduction, showing that bdelloid rotifers, all of which are female, can exchange genetic material via other means.
" ...