Table II.

Summary of embryo controlled factors: expression in Tubal ectopic and potential causal effect in the development of tubal ectopic pregnancy.

Factor	Expression in tubal ectopic pregnancy	Potential effects
Uteroglobin	Increased	Increased inflammation
		Increased receptivity
Leukemia inhibitory factor (LIF)	Increased	Increased receptivity
Homeobox protein A10 (HOXA10)	Increased	Increased receptivity
Vascular endothelial growth factor (VEGF)	Increased	Increased angiogenesis at implantation site
Trophinin	Increased	Increased adhesion leading to increased receptivity
Integrins	Increased	Increased adhesion leading to increased receptivity