Biology, asked by Anonymous, 9 months ago

Describe dilation stage, expulsion staage and after birth point

Answers

Answered by jyeshchikkala

Answer:

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Answered by Anonymous

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Uterine contractions begin

from top, forcing the baby towards the cervix.

Contractions are accompanied by pain caused

by compression of blood vessels. Oxytocin

induced uterine contractions become stronger

and stronger due to stimulatory reflex. As the

baby is pushed down in the uterus, its head

comes to lie against cervix. Cervix gets dilated.

The vagina also shows similar dilation.

This stage of labour can normally last upto

few hours. It ends in rupturing of amniotic

membrane of foetus.

The uterine and abdominal

contractions become stronger. In normal

delivery, the foetus passes out through cervix

and vagina with head in forward direction. It

takes 20 to 60 min. The umbilical cord is tied

and cut off close to the baby’s navel.

After the delivery of the baby

the placenta separates from the uterus and

is expelled out as “after birth”, due to severe

contractions of the uterus. This process happens

within 10 to 45 minutes of delivery.

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