Infertility. Cervical os changes during the menstrual cycle. Image courtesy of Jairo E. Garcia, MD.

Infertility. Clear preovulatory cervical mucus. Image courtesy of Jairo E. Garcia, MD.

Infertility. Fern pattern of preovulatory mucus. Image courtesy of Jairo E. Garcia, MD.

Infertility. Hysterosalpingogram image demonstrating normal findings with bilateral spillage. Image courtesy of Jairo E. Garcia, MD.

Infertility. Antero-retroflexion uterus. Image courtesy of Jairo E. Garcia, MD.

Infertility. Anteroflexion or retroflexion of the uterus. Image courtesy of Jairo E. Garcia, MD.

Infertility. Bilateral cornual obstruction. Image courtesy of Jairo E. Garcia, MD.

Infertility. Salpingitis isthmica nodosa. Image courtesy of Jairo E. Garcia, MD.

Infertility. Hydrosalpinx. Image courtesy of Jairo E. Garcia, MD.

Infertility. Tubal obstruction post–bilateral tubal ligation. Image courtesy of Jairo E. Garcia, MD.

Infertility. Tubal obstruction: Pomeroy bilateral tubal ligation. Image courtesy of Jairo E. Garcia, MD.

Infertility. Intravasation of the contrast medium due to myoma. Image courtesy of Jairo E. Garcia, MD.

Infertility. Extravasation or lymphatic penetration of the contrast medium. Image courtesy of Jairo E. Garcia, MD.

Infertility. Irregular cavity due to intramural fibroids intruding into the cavity. Image courtesy of Jairo E. Garcia, MD.

Infertility. Submucous fibroid. Image courtesy of Jairo E. Garcia, MD.

Infertility. Intrauterine synechiae. Image courtesy of Jairo E. Garcia, MD.

Infertility. Synechiae. Image courtesy of Jairo E. Garcia, MD.

Infertility. Endometrial polyp. Image courtesy of Jairo E. Garcia, MD.

Infertility. Placental polyp. Image courtesy of Jairo E. Garcia, MD.

Infertility. T-shaped uterus. Image courtesy of Jairo E. Garcia, MD.