FOETAL
DEVELOPMENT
• THE GESTATION PERIOD IS 38 WEEKS
OR 9 MONTHS(mo)
• AT THE BEGINNING OF 9 th WEEK ,THE
EMBRYO IS CALLED FOETUS.
• THE GERMINAL STSGE TAKES AROUD 10
DAYS DURING WHICH ZYGOTE BEGINS
TO DIVIDE BY CLEAVAGE.
• GASTRULATION DURING WHICH
3GERM LAYERS OF THEEMBRYO FORM
IN A PROCESS CALLED HISTOGENESIS.
• THEN COMES NEURULATION.
• THE PROCESS ENDS WITH
ORGANOGENESIS.
• HEART BEAT COMES AT AROUND
20WEEKS.