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23 Cards in this Set

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how many days does the sperm last?
3 - 4days
How long does the ovum last?
12 - 24 hours
The blastocyst attaches to the uterine wall and draws nutrients from the ________
endometrium
What 2 structures develops into the placenta?
Trophoblast
endometrium
What is the term for the response relying on the stroma being exposed to oestrogen and progesterone
stroma decidualisation
The endometrium is responsive to the blastocyst _____ days after post ovulation
7 - 10
In pregnancy what is the 1st trimester?
the first 3 months of development
In pregnancy what is the 2nd and 3rd trimester?
The 3rd month to the 9th month
Development of the placenta begins by the _____ sending out projections known as ___________
chorion
chorionic villi
During the first 3 months the corpus luteum is kept intact by the hormone
human chorionic gonadotrophin (HCG)
HCG is produced by _________ cells
trophoblast
What is the 5 hormones that the placenta secretes?
Progesterone
Oestrogen
HCG
human placental lactogen
relaxin
HCG is the basis of _______ test
pregnancy
what chemical stimulates the corpus luteum into oestradiol and progesterone?
luteotrophic hormone
HCG production is __________ - independent of hypothalamus and pituitary
autonomous
The HPL has both ______ and ____ like actions
lactogenic and GH
What does the HPL stimulate in mothers?
increase in lipolysis and increase in free fatty acids
(Oestradiol/Oestriol) is produced by the corpus luteum and the placenta
Oestradiol
(Oestradiol/Oestriol) is produced by the foestus and placenta
Oestriol
What chemical inhibits uterine smooth muscle contractility
Progesterone
What chemical inhibits production of PGF2a and oxytocin
Progesterone
What chemical inhibits T-lymphocyte cell mediated response
progesterone
What are the actions of prostaglandins E2 and P4?
block milk synthesis
block prolactin receptors for lactogenesis