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Genetic incompatibility describes the process by which mating yields offspring that are nonviable, prone to disease, or genetically defective in some way. In nature, animals can ill afford to devote costly resources for little or no reward, ergo, mating strategies have evolved to allow females to choose or otherwise determine mates which are more likely to result in viable offspring.
The condition occurs in most dioecious species, which consist of most animals and some plants. Differences may include secondary sex characteristics, size, weight, color, markings, or behavioral or cognitive traits. Male-male reproductive competition has evolved a diverse array of sexually dimorphic traits.
B. ceti is believed to transfer from animal to animal through sexual intercourse, maternal feeding, aborted fetuses, placental issues, from mother to fetus, or through fish reservoirs. Brucellosis is a reproductive disease, so has an extreme negative impact on the population dynamics of a species.
The cause of the fusion failure is not known. Associated defects may affect the vagina, the renal system and, less commonly, the skeleton. [citation needed] The condition is less common than these other uterine malformations: arcuate uterus, septate uterus, and bicornuate uterus. It has been estimated to occur in 1/3,000 women. [2]
A dearth of research on medical conditions affecting women has led a UCLA researcher to look for insights from the female animal kingdom. Column One: Why this UCLA professor is studying female ...
Importantly so, we decrease the number of studies that are geared towards women's reproductive issues, such as genital disease. In efforts to encourage women to participate in clinical research, the National Institute of Health (NIH) launched the women's health initiative in 1991 that focuses clinical trials and observational studies on post ...
The time at which insemination occurs during the estrus cycle has been found to affect the sex ratio of the offspring of humans, cattle, hamsters, and other mammals. [25] Hormonal and pH conditions within the female reproductive tract vary with time, and this affects the sex ratio of the sperm that reach the egg. [25]
Scientists have never been able to explain why women are at such greater risk of autoimmune disease, but new research published in Cell on February 1 could hold the answer. And the key lies in the ...