The Arabic word sulaalah means quintessence or the best part of a whole. We have come to know now that only one single spermatozoon that penetrates the ovum is required for fertilization, out of the several million produced by man. That one spermatozoon out of several million, is referred to in the Qur’an as sulaalah.

We have also come to know now that only one ovum is fertilized out of the tens of thousands produced by the female. That one ovum out of tens of thousands is also referred to in the Qur'an as Sulaalah. This word also means gentle extraction from a fluid. The fluid refers to both male and female germinal fluids containing gametes. Both ovum and sperm are gently extracted from their environments in the process of fertilization.