Sentences with phrase «human female reproductive»
Researchers have completed the first laboratory model of the human female reproductive cycle
https://www.scientificamerican.com/ Not exact matches
At Key Stage 3 (age 11 to 13 +, Years 7 to 9) schools have to teach: that fertilisation in humans and flowering plants is the fusion of a male and a female cell; about the physical and emotional changes that take place during adolescence; about the human reproductive system, including the menstrual cycle and fertilization; how the foetus develops in the uterus, including the role of the placenta.
The one - flesh unity of spouses is possible because human (like other mammalian) males and females, by mating, unite organically — they form a single reproductive principle.
«During development, both male and female embryos start out having certain fetal tissue called the Müllerian duct mesenchyme,» said Jose Teixeira, professor of reproductive biology in the College of Human Medicine and lead author of the federally funded study.
In human terms, it'd be as if the asexual females could produce children at 13 years of age, whereas the sexual females wouldn't reach reproductive age until age 18.
Female promiscuity — something that occurs in a majority of species, including humans — results in the ejaculates from two or more males overlapping within her reproductive tract.
In humans and other mammals, the female reproductive cells — the eggs or oocytes — need nourishment in order to grow and remain fertile.
Dr Kristensen comments, «Although this may not be a severe impairment to fertility, it is still of real concern since data from three different labs all independently found that paracetamol may disrupt female reproductive development in this way, which indicates further investigation is needed to establish how this affects human fertility.»
Caspari's findings add to the growing support for the grandmother hypothesis, which suggests that human females (unlike those of most species) live far past their reproductive years because their presence aids their grandchildren.
Montreal — In humans and other mammals, the female reproductive cells — the eggs or oocytes — need nourishment in order to grow and remain fertile.
Although we stray from the path more often than we care to admit, human society is all about the age - old business of boy meets girl and sets up home under a roof, so much so that it explains such things as the size of our testicles, the manifest oddities of the female reproductive system, and why we prefer to have sex in private.
This percentage is low given the growing knowledge base indicating that physiology and pathophysiology differ between male and female animals and humans beyond reproductive function to include all physiological systems,» according to the editorial.
Scientists publishing in Nature Communications report that they have developed a mini working replica of the female reproductive tract using human and mouse tissue.
«This is an important advance in explaining how sperm become hypermotile in the female reproductive tract,» said Stuart Moss, Ph.D, director of the male reproductive health program at NIH's Eunice Kennedy Shriver National Institute of Child Health and Human Development, which funded the study.
«Until the past decade, we all accepted this notion that human female sexuality was radically different from sexuality in all of these other animal species — that, unlike other species, human female sexuality was somehow walled off from reproductive hormones,» Haselton said.
There have been reproductive toxicology studies with female rats where they were given up to 80 times the concentrated used clinically in humans, showing no difference in offspring compared with the rats given none.
The reproductive (estrus) cycle of the dog differs from that of a female human in a couple of ways.
Jeffrey Parker and colleagues, in a study of teen friendships published in 2005, challenged psychologists David Buss and Todd Shackelford's theory that jealousy has evolved as a human emotion because of the different reproductive challenges faced by males and females.