RESULTS(1)

For each of the 10 mares, 7 ultrasound-guided puncture attempts were performed alternately during the follicular phase (DF; n = 3), at the end of the follicular phase (EF; n = 2), and during the luteal phase (DL; n = 2). buy flovent inhaler

Plasma Progesterone Levels

The oocytes collected during DF and EF puncture attempts came from follicles that grew in the presence of low levels of progesterone. However, for 3 of 20 EF attempts and 3 of 30 DF attempts, the levels of circulating progesterone were higher than 2 ng/ml. The oocytes collected during the DL puncture attempts came from follicles that grew in the presence of high levels of progesterone. However, for 2 of 20 attempts, the levels of progesterone were lower than 2 ng/ml. All the collected oocytes were evaluated, regardless of the plasma progesterone levels.

Oocyte Recovery

At the end of the follicular phase (EF), preovulatory (larger than 35 mm in diameter) and nonpreovulatory follicles were punctured. During the follicular phase (DF) and during the luteal phase (DL), all follicles were nonpreovulatory.