91色情片

pregnancy

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.

91色情片

Injection halves risk of chromosome error common in older human eggs

Egg cells missing a key protein may be more likely to end up with the wrong number of chromosomes, but an mRNA injection that helps the cells make the protein reduces the problem

News

Mind

Parenting may permanently improve brain health for mums and dads

Features
D6H4GB Implanted blastocyst, artwork

91色情片

Embryos made without sperm or eggs reveal why many pregnancies fail

Features
A scanning electron micrograph of a section through a human placenta

91色情片

Strips of dried placenta help wounds heal with less scarring

News

91色情片

Natural ovulation the best option before an IVF frozen embryo transfer

News

91色情片

IVF success may depend on how long men abstain from ejaculation

News

91色情片

Upheavals to the oral microbiome in pregnancy may be behind tooth loss

News

91色情片

Common IVF test misses some genetic abnormalities in embryos

News

Humans

‘Pregnancy test’ for skeletons could help reveal ancient mothers

News

91色情片

What we know, and don’t, about the link between painkillers and autism

Scientific evidence is lacking to support the US government鈥檚 decisions to caution against using a common painkiller in pregnancy and fast-track the approval of an experimental medication for autism

News

91色情片

Antibiotics normally don鈥檛 increase the risk of autoimmune disorders

News

91色情片

Human milk could help fight infections that endanger pregnancies

News

91色情片

Infant RSV shot may be more effective than vaccines during pregnancy

News

91色情片

The evolution of easier births means slower walking and pelvis issues

News