ثُمَّ جَعَلْنَـٰهُ نُطْفَةً فِى قَرَارٍ مَّكِينٍ Qur’an Al-Muminun (23:13)Thumma jaAAaln a hu nu t fatan fee qar a rin makeen in
See footnote for 22:5.
The growth in the foetal stage is silent and unseen. The foetus is protected in the mother's womb like a king in a castle; it is firmly fixed, and gets the protection of the mother's body, on which it depends for its own growth until birth.