Examlex
An electron gains energy in the transition from a 4d subshell to a 5s subshell.
Age Of Viability
The age at which a premature baby is capable of surviving outside the womb with medical support, typically around 24 weeks of gestation.
Germinal Period
The initial two weeks of prenatal development following conception, characterized by rapid cell division and the beginning of cell differentiation.
Placenta
An organ that develops in the uterus during pregnancy, providing oxygen and nutrients to the growing baby while removing waste.
Implantation
The process by which a fertilized egg attaches itself to the wall of the uterus, beginning the stages of pregnancy.
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