Other food element. Carrot: Carrot contains a variety of rich carotene, vitamins and good to human body other nutrition part. American new jersey the research of expert of department of gynaecology of the college of medicine discovers Luotejisi, after the woman eats carrot too much, a large number of absorbed carotene can be caused amenorrhoea and restrain ovarian normal oviposit function. Accordingly, the woman that is about to bear is unfavorable eat carrot more; Sunflower seed: The protein part of sunflower is contained restrain spermary composition, can cause spermary atrophy, affect normal birth function, reason Yo age the youth is unfavorable feed more; Garlic: Feed garlic to overcome the healthy atmosphere of cut down person more, still have the apparent effect that exterminates spermatozoon, yo age youth if edible is overmuch, opposite Yo is having adverse effect, reason is unfavorable feed more.