Childbirth
Orginially, the corpeus luteum secretes oestradiol and progesterone to maintain pregnancy but at about the ____ week, this task is taken over by the _______. High possibility of ________ at this time.
Ninth, placenta, miscarriage
Progesterone inhibits the release of ________.
Oxytocin
Where is oxytocin released from?
Pituitary gland
At the end of pregnancy, the fetus secretes hormones to inhibit the release of __________ from the placenta and therefore releasing __________.
progesterone, oxytocin
What does oxytocin cause?
The contraction of muscle fibres in the uterus
Contractions are detected by stetch receptors which signal the _________ to release more ___________, causing more contractions. Is this positive or negative feedback?
Pituitary gland, oxytocin, positive feedback