title: Sex determination of bovine embryos based on embryonic cleavage rates.
abstract: Bovine embryos (n = 64) collected at day-6 from 10 superovulated and inseminated donors were evaluated upon recovery and again after incubation for approx. 12 hrs. According to cleavage rate they could be divided into a fast, an intermediate and a slow developing group, respectively. This grouping was correlated to embryonic sex determined by karyotyping (n = 29). From the fast developing group we found 7 males and 2 females (male ratios 78%), from the intermediate group 3 males and 8 females (male ratio 27%) and from the slow group 1 male and 8 females (male ratio 11%). From this preliminary study it is concluded that the rate of embryonic development may be used as a sex discriminator.
authors.forename: B
authors.initials: B
authors.lastname: Avery
authors.forename: M
authors.initials: M
authors.lastname: Schmidt
authors.forename: T
authors.initials: T
authors.lastname: Greve
mesh_terms: D000818:Animals; D002417:Cattle / Q000196:embryology*; D016009:Chi-Square Distribution; D005260:Female; D007621:Karyotyping; D008297:Male; D012732:Sex Determination Analysis; D012744:Sex Ratio