Summary: Reproduction And Fertility
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lecture 3 pregnancy and parturition
This is a preview. There are 23 more flashcards available for chapter 19/06/2019
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What is the function of PGF2a after parturition?
Expulsion of lochia and reduction of uterine size by myometrial contractions -
What is meant with uterine involution?
Restoration of the uterus to its normal non pregnant size and function after parturition -
How is lactational anoestrus caused?
Low GnRH/LH release from the milk production and negative energy balance in lactation -
What are the 4 stages of puerperium?
1
Myometrial contractions and expulsion of lochia
2
Endometrial repair
3
Resumption of ovarian function
4
Elimination of bacterial contamination of the reproductive tract -
What hormones play a role in the expulsion of the foetus?
Oxytocin and PGF2a -
What hormones play a role in cervical dilation and relaxation of the pelvic ligaments?
Relaxin, oestrogens and PGF2a -
What are the 3 phases of parturition?
1
Cervical dilation and relaxation of the birth canal
2
Expulsion of the foetus
3
Expulsion of the foetal membranes -
Swelling of mammary tissue, restless and milk production are an example of:
Symptoms before parturition -
Besides progesterone and oestrogen, 2 other hormones play a role in the parturition process. What are those hormones and what do they do?
relaxin:- Not in the cow
- produced by the placenta and by the CL
- causes softening of the connective tissue in the cervix
- promotes elasticity of the pelvic ligaments
maternal oxytocin:- Produced by the pituitary
- Stimulates contraction of the smooth muscles in the myometrium
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What is the function of PGF-2a?
Inducing regression of the corpus luteum and thus a decline in progesterone.
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