Pregnancy Sickness

Question 1

2 Adaptive problems of omnivores?

Answer 1

Plant species have evolved toxins as a means of deterring animals from eating them
Meat can spoil easily

Question 2

2 evolutionary hypotheses regarding PS

Answer 2

Embryo protection hyp - PS an adaption

Embryo quality hypothesis - not adaptions, by-products

Question 3

What kinds of foods women likely to avoid?

Answer 3

Teratogens - cabbage, broccoli, brussel sprouts, coffee, alcohol
Spoil easily from parasites (meat, eggs)

Question 4

Evidence for embryo protection hypothesis 3

Answer 4

PS occurs at time of pregnancy when fetus is most vulnerable to toxins
PS starts to abate at 8 weeks and is generally over by 14
Cross-cultural data

Question 5

embryo quality hypothesis 4 stages p1

Answer 5

high levels of LH associated with nausea, vom
LH regulates corpus luteum function 
keeps cl from regressing
maintains proper progesterone
maintains pregnancy

Question 6

EQH p2

Answer 6

genetic conflict between mother & embryo
Mother will maintain pregnancy if benefits outweigh costs
genetic conflict between mother & embryo,

Question 7

EQH p3

Answer 7

hCG produced by embryo in early pregnancy
related to LH, mimics effects
hCG related to vom, nausea