Your emotions might range from excitement to anxiety. These changes affect every organ system in your body, and their symptoms may even occur in the first weeks of pregnancy. During this time, your body undergoes many changes triggered by hormones. During this time span, the possibility of a miscarriage (natural death of an embryo or fetus) or a severe disability is the highest. The first trimester is from week 1 to week 12 and includes conception (when a sperm fertilizes an egg). Pregnancy is divided into three trimesters (each lasts three months). ![]() White European women also tend to have naturally longer pregnancies than African-Caribbean or Asian women. Moreover, tall women tend to have longer pregnancies than shorter women. Extended implantation determines longer gestation from implantation to birth. The length of pregnancy may also be influenced by how long it took the embryo to implant after conception. Multiple pregnancies, like twins and triplets, tend to be born prematurely – the higher number of babies, the earlier they are usually born. Childbirth after week 42 is called a prolonged pregnancy and may carry a higher risk of complication. Factors like the rise in maternal obesity and age may contribute to early births. Once the child is delivered, medical staff assesses its health with an on-site APGAR score.īabies born before week 37 are considered premature and usually need extra medical care for some time. ![]() There is a 5-week time span when a baby may arrive and would be considered as born in term. The length of healthy pregnancies is between 37 and 42 weeks.
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