Does microinjection of mitochondria into zygotes create a model for studying the inheritance of mitochondrial DNA during preimplantation development?
It appears that preimplantation embryo development does not screen out mitochondrial DNA mutations introduced into fertilized oocytes, and low levels of mutant mitochondrial DNA do not disrupt early embryo development.
Low parental monitoring was prospectively associated with incidence of biologically confirmed pregnancy among minority adolescent females. This finding adds to a growing body of empirical literature that supports the value of parental monitoring as a protective factor in adolescents' lives. Interventions designed to increase parental monitoring or adolescent females' perceptions of their parents' monitoring may be effective components of pregnancy prevention programs designed for minority youth.