The effects of chemicals upon sperm fertilization capability in IVF procedure and subsequent embryonic development.

aBased on total oocytes.
bBased on total pronuclear embryos.
*, #, $P<0.05, comparisons were made between control group and each treated group, nicotine group and two insecticide groups, and two insecticide groups, respectively.

a. 以总卵母细胞（oocytes）为统计基准；
b. 以总原核胚胎（pronuclear embryos）为统计基准；
*、#、$ 均代表显著性水平P<0.05，组间比较分别为对照组与各处理组、尼古丁组与两个杀虫剂组，以及两个杀虫剂组之间的比较。