Expression of steroid receptors in endometrium during ovarian stimulation.

The purpose of this study is to examine in stimulated cycles a) whether there is a difference in expression of steroid receptors in stroma and glands of endometrium between different days during the follicular phase b)whether there are secretory changes detected by endometrium histology before ovulation c)whether there is an association between expression of steroid receptors in endometrium and exposure to oestradiol and progesterone during the follicular phase.

Inclusion Criteria:

• Treatment by IUI,
• BMI:18-29KGR/M2,
• No previous ovarian surgery,
• Normal hysterosalpingography,
• Estradiol < 80pg/ml and progesterone < 1.6ng/ml on day 2 of the cycle

Exclusion Criteria:

• Endometriosis,
• Severe male factor

infertile women