%0 Journal Article %J Baillieres Clin Obstet Gynaecol %D 1991 %T Frequency of implantation and early pregnancy loss in natural cycles. %A Chard, T %K Abortion, Spontaneous %K Chorionic Gonadotropin %K Embryo Implantation %K Female %K Fertilization in Vitro %K Humans %K Pregnancy %B Baillieres Clin Obstet Gynaecol %V 5 %P 179-89 %8 1991 Mar %G eng %N 1 %1

http://www.ncbi.nlm.nih.gov/pubmed/1855339?dopt=Abstract