Live birth rate with double ovarian stimulation is superior to follicular phase ovarian stimulation per started cycle in poor ovarian responders.

AIM: To compare the outcome of double ovarian stimulation (DOS) with follicular phase ovarian stimulation (FPS) per started cycle in poor ovarian responders (PORs). METHODS: A total of 204 PORs who underwent ovulation induction for in vitro fertilization, cryopreservation of all embryos available, and frozen embryo transfer cycle were retrospectively analyzed. Of those, 146 received single FPS, and 58 received DOS. All viable embryos were cryopreserved and subsequently transferred within 1-6 months. RESULTS: The number of oocytes collected and the number of mature oocytes per started cycle were higher in the DOS group compared to the FPS group (6.0 ± 1.9 vs. 2.8 ± 1.3 and 4.3 ± 1.3 vs. 2.2 ± 1.2, respectively, p = 0.001). Clinical pregnancy rate and live birth rate per started cycle were also significantly higher in the DOS group than the FPS group (41.4% vs. 16.4% and 36.2% vs. 15.1%, respectively, p < 0.001). The cancellation rate of embryo transfer due to no viable embryo was significantly lower in the DOS group (10.3%) than the FPS group (40.4%) (p = 0.001). In the DOS group, numbers of oocytes (3.2 ± 1.2 vs. 2.7 ± 1.1, p = 0.006), MII oocytes (2.6 ± 1.0 vs. 2.1 ± 0.8, p = 0.001), and cryopreserved blastocysts (1.5 ± 0.8 vs. 1.1 ± 0.7, p = 0.002) were significantly higher in the luteal ovarian stimulation compared to follicular ovarian stimulation. CONCLUSIONS: Live birth per started cycle with DOS is superior to FPS in PORs. Luteal phase stimulation contributes to improving pregnancy rates in these patients.

Does metoclopramide exposure alter endometrial receptivity and decrease pregnancy rates?

OBJECTIVE: The aim of this study was to investigate the effect of metoclopramide on endometrial receptivity with an immunohistochemical investigation of integrin ß3 expression in pregnant rats. MATERIALS AND METHODS: In the present study, the pregnant mice administrated by different doses of metoclopramide were used to explore the effect of metoclopramide on embryo implantation, especially on the endometrial receptivity. RESULTS: The statistical results showed that the number of implanted embryos was gradually declining along the increasing dose of metoclopramide. When the administrated dose of metoclopramide was 3 mg/kg per day, great changes were observed in the exposed uterine morphology and down-regulated integrin ß3 were also found in high dose metoclopramide-exposed mice. CONCLUSION: Metoclopramide exposure, especially in high doses may alter endometrial receptivity by effecting integrin expression on decidual tissue which can decrease pregnancy rates. This drug should only be recommended for use during pregnancy when benefit outweighs the risk.