1. Controlled ovarian hyperstimulation. Advanced Fertility Center of Chicago Web site. Available at: http://www.advancedfertility.com/ovarstim.htm. Accessed on January 6, 2009.
2. IVF procedure: Success rate of IVF treatment (pregnancy rate). IVF-infertility.com Web site. Available at: http://www.ivf-infertility.com/ivf/standard/procedure/success_rates.php). Accessed on January 6, 2009.
3. Exogenous gonadotropins—serum oestrogen and progesterone and the effect on the endometrial morphology in the rat;Kramer;J Anat,1990
4. Hyperstimulation affects vascular permeability at implantation sites in the rat endometrium;Kramer;J Assist Reprod Genet,1993
5. Exogenous gonadotrophin administration affects the glycocalix of rat endometrial epithelial cells during the period of implantation;Kramer;J Assist Reprod Genet,1994