女生小视频

Clusters of sperm

Life

Sperm move in packs like cyclists to push through thick vaginal fluid

In mock-ups of the female reproductive tract, bull sperm cluster in groups of two to four, which seems to help them swim upstream

Synthetic (left) and natural (right) embryos to show comparable brain and heart formation.

Health

Synthetic mouse embryos with rudimentary brain grown in the lab

Light micrograph of a section through the seminiferous tubules, the site of sperm production

Health

Tiny bubbles in semen could contribute to 鈥榰nexplained infertility鈥�

A sperm sample with low numbers of sperm

Health

Infertility in some men may be caused by X chromosome mutations

The development of a human embryo

Health

Why two-thirds of IVF embryos suddenly stop developing

Cross section of infertile mouse testis showing previously frozen transplanted rat germ cells and sperm. Frozen testicular tissue still viable after two decades.

Health

Rat testicle cells make sperm after being frozen for 23 years

Doctor prepping a womans arm with alcohol swop. Female getting her arm disinfected for her covid vaccine.; Shutterstock ID 1976002664; purchase_order: -; job: -; client: -; other: -

Health

Covid-19 vaccines don’t affect success of fresh embryo transfer IVF

rPGCLC-derived pups (Generated by injection of rPGCLC-derived spermatids into rat oocytes)

Health

Rat pups born from sperm artificially produced from stem cells

Light micrograph cross section of a normal human testicle or testes. The tunica albuginea is the dense, white inelastic tissue immediately covering the testis. The septa extends from the tunica albuginea into the testicle, dividing the testes into lobules.

Health

Male fertility could be restored by reimplanting frozen testes tissue

Oral contraceptive pill

Health

Contraceptive pill may reduce polycystic ovary syndrome diabetes risk

Women with polycystic ovary syndrome (PCOS) who take the contraceptive pill have three-quarters of the diabetes risk as those with PCOS who don鈥檛

Health

Women are less likely to get pregnant for two years after a concussion

Health

女生小视频s have worked out how to send viable mouse sperm on postcards

Health

Study of how genes influence menopause may improve fertility treatment

Health

The number of twins in the world is the highest it has ever been