it is concluded that the serum-free culture medium described and the testing for absence of cytotoxicity in a sensitive bioassay ( hybritest ) have yielded culture conditions capable of sustaining the development in vitro of human preembryos without impairing the fertilization process or the implantation rate , ultimately resulting in a significantly increased rate of deliveries/ongoing pregnancies and an apparently decreased abortion rate .
C0015914
fertilization
C0032961
pregnancies