Maternal serum vascular endothelial growth factor levels in early ectopic and intrauterine pregnancies after in vitro fertilization treatment. - PCRM Vancouver Fertility Clinic

Fasouliotis SJ, Spandorfer SD, Witkin SS, Liu HC, Roberts JE, Rosenwaks Z.

Fertil Steril. 2004 Aug;82(2):309-13.
https://www.ncbi.nlm.nih.gov/pubmed/15302276