Processes underlying Mexican adolescents' sexual behaviors and intentions: Examining the roles of familial cultural values and parental monitoring.

Objectives: The study examined the associations between familial cultural values of (familism) and (respect), parental monitoring, and Mexican adolescents' sexual behaviors.

Method: The sample consisted of 1,024 Mexican adolescents (12-18 years) from two urban schools in Puebla, Mexico.

Results: Findings indicated that was associated with paternal and maternal monitoring, sexual responsibility, sexual intention, and sexual behavior.

Transvaginal ultrasound-guided oocyte retrieval in cattle: State-of-the-art and its impact on the in vitro fertilization embryo production outcome.

Transvaginal ultrasound-guided oocyte retrieval (commonly called OPU) and in vitro embryo production (IVP) in cattle has shown significant progress in recent years, in part, as a result of a better understanding of the full potential of these tools by end users. The combination of OPU and IVP (OPU-IVP) has been successfully and widely commercially used worldwide. The main advantages are a greater number of embryos and pregnancies per unit of time, faster genetic progress due to donor quick turn around and more elite sires mating combinations, larger spectrum of female age (calves, prepuberal, heifer, cow) and condition (open, pregnant) from which to retrieve oocytes, a reduced number of sperm (even sexed) required to fertilize the oocytes, among other benefits.