You began when egg and sperm met, and the DNA from your biological parents teamed up. Your first cell began copying its newly ...

(d) “Female” means a person belonging, at conception, to the sex that produces the large reproductive cell. (e) “Male” means ...

The fusion of an egg and a sperm triggers a complex plethora of events that will ultimately ... The Research Topic of these papers range from basic research on animal germ cells and embryos to ...

The executive order’s definitions of male and female left room for interpretation contrary to the spirit of the order.

Scientists are seeking permission to generate human embryonic stem cells ... fertilization (IVF), intracytoplasmic sperm injection (ICSI) and somatic cell nuclear transfer (SCNT).

Jan. 15, 2025 — While most known types of DNA damage are fixed by our cells' in-house DNA repair mechanisms, some forms of DNA damage evade repair and can persist for many years, new research shows.

Infertility is a major global challenge associated with physiological and psychological impact. Genetic mutations that affect ...

For sex sorted semen, the ability to shift the gender ratio of a calf crop comes from the fact that gender is determined by the sperm cell that fertilizes the egg. Sperm cells that result in a heifer ...

control cell development in the human embryo during the first days after fertilization. The ... Oct. 11, 2024 — Researchers have linked specific frequent defects in sperm to risk of pregnancy ...

Childhood stress may leave lasting marks on sperm, altering epigenetic profiles and potentially influencing brain development ...

Fertilisation happens if the egg cell meets and joins with a sperm cell in the oviduct. The human female reproductive system working during reproduction and fertilisation. The egg is released from ...

One of President Donald Trump's executive orders offers a new federal government definition of the sexes that could have a major impact on transgender people. Here's a look at how.