SIVF, to my knowledge, use a very strict scale to assess normal morphology. This scale assesses any sperm which isn't textbook perfect (even slightly off) as being abnormal. However, these sperm may still be quite capable of fertilisation. There hasn't been a lot of research in to this.
According to the local path lab, a normal morph result is anything over 15%. Whereas SIVF said anything over 3% was normal. It is amazing that only 3% of normally shaped sperm is considered average (and this has recently changed again I believe to a lower figure), but they say humans really aren't the best breeders and it's normal to have more d!cky sperm than good.
Reply With Quote
Bookmarks