Ovaries move into pelvis.
Pryor JL, Hughes C, Foster W, Hales BF, Robaire B. 2000. Critical windows of exposure for children’s health: the reproductive system in animals and humans. Environ Health Perspect 108 (Suppl 3):491-503.
The nipple anlage have formed; there is condensation of the mesenchyme to form the smooth muscle of the nipple. The edge of the breast anlage has begun to from outgrowths.
Duration: 4 weeks
Laurence DJ, Monaghan P, Gusterson, BA. 1991. The development of the normal human breast. Oxford Reviews of Reproductive Biology 13:149-174.
Ovarian cortex begins to thicken due to increased mitosis of germ cells and primitive granulosa cells.
Rabinovici J, Jaffe RB. 1990. Development and regulation of growth and differentiated function in human and subhumand primate fetal gonads. Endocrine Reviews 11(4):532-557.
Oogenesis: Zygotene stage of meiosis starts (chromosomes line up in homologous pairs) and reaches its peak.
Duration: 1 week
Rabinovici J, Jaffe RB. 1990. Development and regulation of growth and differentiated function in human and subhumand primate fetal gonads. Endocrine Reviews 11(4):532-557.
Primordial sex cords have split and fragmented in the basal area of the ovary (medulla).
Satoh M. 1991. Histogenisis and organogenisis of the gonad in human embryos. J. Anat 177:85-107.