@article {310406,
	title = {Frequency of implantation and early pregnancy loss in natural cycles.},
	journal = {Baillieres Clin Obstet Gynaecol},
	volume = {5},
	year = {1991},
	month = {1991 Mar},
	pages = {179-89},
	keywords = {Abortion, Spontaneous, Chorionic Gonadotropin, Embryo Implantation, Female, Fertilization in Vitro, Humans, Pregnancy},
	issn = {0950-3552},
	author = {Chard, T}
}
