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Early-stage mice embryos developed in 2 per cent oxygen, including the cells' nuclei (blue) and cells that will go on to form the placenta (pink)

Health

IVF embryos may thrive when grown with less oxygen

Decreasing the amount of oxygen that IVF-conceived embryos are developed in could improve outcomes, such as reducing the risk of low birth weight

Fluorescence in situ hybridisation (FISH) micrograph of Down's syndrome chromosomes (red) in a foetus' cell nuclei (blue). The FISH technique enables individual chromosomes within the nuclei to be tagged with a fluorescent dye. Here, three copies of chromosome 21 are seen in each nucleus, the cause of Down's syndrome. In a healthy human, each nucleus contains only two copies of chromosome 21. Chromosomes are the parts of a nucleus responsible for carrying the genetic code. Down's syndrome is a genetic disease which causes mental retardation and typically flattened features. It affects around 1 in every 650 babies.

Health

Injection halves risk of chromosome error common in older human eggs

Light micrograph of a section through follicles in an ovary. The immature eggs (orange) are surrounded by a fluid-filled cavities (light pink) and granulosa cells (dark pink), which provide immature eggs with nutrients and hormones

Health

Our fertility window could be extended by making ovaries softer

Health

Lambs born via IVF using highly immature eggs in major breakthrough

Health

Ovary identity shift after menopause may contribute to inflammation

Health

We鈥檝e uncovered a master gene that switches on human development

D6H4GB Implanted blastocyst, artwork

Health

Embryos made without sperm or eggs reveal why many pregnancies fail

Health

Will lab-grown sperm let infertile men have children of their own?

A light micrograph of a section through an ovary with polycystic ovary syndrome (PCOS), with two cysts demonstrated in light pink. Except, they're not actually cysts

Health

PCOS has been officially renamed PMOS, and it鈥檚 a momentous move

Health

PCOS postpones perimenopause and allows pregnancies at older ages

Only 3 per cent of those with polycystic ovary syndrome reach perimenopause by the age of 46, which may allow them to conceive when older

Society

The real reasons birth rates are declining worldwide

Health

Menstrual pad could give women insights into their changing fertility

Health

Natural ovulation the best option before an IVF frozen embryo transfer

Health

IVF success may depend on how long men abstain from ejaculation