- sperm viability
- 精子活力
English-Chinese Dictionary of Agriculture (英汉农业大词典). 2013.
sperm viability
Look at other dictionaries:
Sperm competition — is competition between sperm of two or more males for the fertilization of an ovum (Parker 1970). Sperm competition is often compared to having tickets in a raffle; a male has a better chance of winning (i.e. fathering offspring) the more tickets … Wikipedia
Sperm donation — is the provision (or ‘donation’) by a man, (known as a ‘sperm donor’), of his sperm, with the intention that it be used to impregnate a woman who is not usually the man s sexual partner, in order to produce a child. A sperm donor is the natural… … Wikipedia
Chain catshark — Conservation status Least Concern ( … Wikipedia
Inbreeding — is breeding between close relatives, whether plant or animal. If practiced repeatedly, it leads to an increase in homozygosity of a population. A higher frequency of recessive, deleterious traits in homozygous form in a population can, over time … Wikipedia
Progestogen only pill — Infobox Birth control name = Progestogen Only Pill (POP) width = caption = bc type = Hormonal date first use = 1973 rate type = Failure perfect failure% = 0.5 typical failure% = ? duration effect = 1day reversibility = Yes user reminders = Taken… … Wikipedia
Progestogen-only pill — (POP) Background Birth control type Hormonal First use 1973 Failure rates (first year) Perfect use 0.5% Typical use 8.0% … Wikipedia
Seed — A seed Audio IPA|en us seed.ogg|/ˈsiːd/ (in some plants, referred to as a kernel) is a small embryonic plant enclosed in a covering called the seed coat, usually with some stored food. It is the product of the ripened ovule of gymnosperm and… … Wikipedia
Life Sciences — ▪ 2009 Introduction Zoology In 2008 several zoological studies provided new insights into how species life history traits (such as the timing of reproduction or the length of life of adult individuals) are derived in part as responses to… … Universalium
Mate Choice — is the process in which one organism chooses another one to mate with. The overall reason for mate choice in any species is to pick a mate that can provide better genetic material that will produce more fit offspring that are more likely to… … Wikipedia
Cryopreservation — of plant shoots. Open tank of liquid nitrogen behind … Wikipedia
Pregnancy — For pregnancy in non human animals, see Pregnancy (mammals). Pregnancy Classification and external resources A pregnant woman at the end of the second trimester. ICD 10 … Wikipedia
