New observations on endometrial physiology after transcervical injection of methylene blue dye.

We describe the in vivo features of endometrium stained with methylene blue dye and observed via microhysteroscopy, showing the patterns of endometrial glands and superficial cell changes during the midproliferative, periovulatory, and midluteal phases. These preliminary observations have allowed us to identify a series of changes occurring in the different phases of the ovulatory cycle of potential value in reproductive medicine for specific groups of infertile patients.

Endometrial lesions caused by catheters used for embryo transfers: a preliminary report.

Objective: To visualize by microhysteroscopy any possible lesions on the endocervix and endometrium made by the catheters commonly used for embryo transfer (ET).

Design: Prospective descriptive study. Tertiary fertility center (IFER).