Retrieval of rhesus monkey (Macaca mulatta) oocytes by ultrasound-guided needle aspiration: problems and solutions.

Oocytes of nonhuman primates such as rhesus monkeys are excellent models for diverse studies on developmental biology, epigenetics, human reproduction, and assisted reproductive technologies, as well as on transgenics. Such studies require numerous oocytes that can be retrieved after controlled ovarian stimulation. Currently, most primate centers use laparoscopic aspiration or laparotomy followed by aspiration to collect rhesus oocytes, although the ultrasound-guided needle aspiration is more advantageous due to reduced infection risk, less injury, and a shorter recovery period.

Successful management of cervical pregnancy with medical intervention only: a case report.

Background: Cervical pregnancies are a rare form of ectopic pregnancy. They frequently present with hemorrhage and require hysterectomy to control bleeding. Their incidence may be higher with in vitro fertilization than previously considered.