The fetal period occurs from 35 days of gestation to birth and marks the completion of organ development that occurred during the embryonic phase, the 2008 paper said.

During each week of pregnancy, your baby is growing. Here’s a look at what medical terms like embryo and fetus mean in terms of development.

The researchers found that the oldest genes evolutionarily were expressed during a middle phase, also known as the "phylotypic period," of the zebrafish's embryonic development.

Smoking by mothers during the period immediately before and after conception is linked to a delay in embryonic development, smaller fetuses at the time of the 20-week ultrasound scan, and lower ...

Findings show two peaks when temperature influences the sex determination – at the beginning and the end of the critical period of incubation known as the thermosensitive period of development.

The finding, the team says, suggests that the normal critical period of plasticity in the visual cortex is regulated by a developmental program intrinsic to inhibitory neurons, and that embryonic ...

New period of brain 'plasticity' created with transplanted embryonic cells Date: April 5, 2010 Source: University of California - San Francisco Summary: Scientists report that they were able to ...

UCSF scientists report that they were able to prompt a new period of "plasticity," or capacity for change, in the neural circuitry of the visual cortex of juvenile mice. The approach, they say ...