Given the task definition and input, reply with output. Given an abstract, indicate which of the provided candidate titles (Option1 and Option2) best describes it (respond with the text of the title, not option1/2).

Abstract: The combined experience at two institutions was reviewed to evaluate endometrial biopsy and the prognosis for pregnancies affected by endometrial sampling during the cycle of conception. In the evaluation of 1,084 patients, 1,174 biopsies were performed. Twenty-seven endometrial biopsies were done during the cycle of conception, with spontaneous abortion occurring in six cases (22.2%). Multiple diagnoses were made (including luteal phase defects, endometritis and polyps), and interruption of pregnancy occurred. Several cases illustrate disturbing complications. Methods of minimizing pregnancy interruption and patient discomfort are available. 
 Which is the apt title for the abstract? option1: Endometrial biopsy in the infertility investigation. The experience at two institutions. option2: Pain in early cancer of the lungs.

Endometrial biopsy in the infertility investigation. The experience at two institutions.