2006-12-04 23:27:32 · 7 answers · asked by jeanne g 1 in Science & Mathematics ➔ Biology
It's 38 weeks long and divided into 3 three month trimesters.
2006-12-05 01:44:12 · answer #1 · answered by Lime745 3 · 0⤊ 0⤋
Human gestation period is just the period of time between conceiving the baby and laboring for it. It will usually last for about 9 months or 40 weeks.
The gestation period may also be calculated by an ultrasound examination, which is most reliable for this purpose between the eighth and eighteenth weeks of pregnancy.
2006-12-04 23:49:12 · answer #2 · answered by ayaliz 2 · 1⤊ 0⤋
Pregnancy is divided into three trimesters, each three months long. The third trimester begins at about 28 weeks, the first week when a preterm fetus is considered viable. Before this age major developmental events that would allow the fetus to survive outside the womb have not yet occurred.
In humans, parturition normally occurs at a gestational age of 37 to 42 weeks. Childbirth occurring before 37 weeks of gestation is considered preterm, childbirth after 25 weeks is usually considered "viable". Preterm and low birth weight babies make up the second leading cause of infant death at about 17%. [citation needed] Preterm births solely consist of 12% of infant deaths with an 84% majority within the 32-36 week period. It is estimated that two million babies worldwide die annually within 24 hours of birth.
2006-12-04 23:46:21 · answer #3 · answered by Mikhil M 2 · 0⤊ 0⤋
gestation period starts before 2 months of the delivary
2006-12-04 23:31:52 · answer #4 · answered by pinky 1 · 0⤊ 1⤋
Normally it will last 9 months. Some women go longer and
some women deliver early.
2006-12-04 23:37:19 · answer #5 · answered by Precious Gem 7 · 0⤊ 0⤋
40 weeks.
2006-12-04 23:28:35 · answer #6 · answered by Lori E 4 · 0⤊ 0⤋
pregnancy will last 40 weeks
2006-12-04 23:29:37 · answer #7 · answered by silverearth1 7 · 0⤊ 0⤋