In the fertile human female, approximately on which day of the menstrual cycle $(32\; days)$ does ovulation take place?
$Day \;18$
$Day\; 14$
$Day\; 1$
$Day\; 8$
Relative sizes of an egg cell, morula, blastula and gastrula are
When a foetus develops limbs and digits?
Sequence of hormones during menstrual cycle is
From which embryonic structure develops the vertebral column
Prepuberal period refers to a stage of