President Donald Trump has signed an executive order that aims to expand access to in vitro fertilization, or IVF, a practice ...

Male and female reproductive systems allow human reproduction. Fertilisation occurs when a sperm and egg join to form an embryo ... that regulate the ovulation cycle. Each cycle an egg travels ...

After years of trial and error, scientists have finally done something incredible: They have successfully grown human stem cells in a pig embryo. Why would anyone do this? Turns out, many ...

If a human–animal cybrid embryo were genotyped based solely on its mtDNA content, then genetically it would be deemed animal, especially if it were homoplasmic with only recipient oocyte mtDNA.

Nevada Democrats introduced Senate Bill 217 Wednesday to expand in vitro fertilization. IVF is a “procedure that involves ...