FIRST: To Completely Prevent Pregnancy.
This is not permissible because:
- (a) it will diminish the Islamic population and this is against the objective of Sharee’aa which aims at increasing the population of Muslims.
- (b) the woman is unable to guarantee against the death of her existing children and thus she may die without having any children.
SECOND: To Temporarily Prevent Pregnancy.
This applies if the woman had many pregnancies and this is beginning to weaken her. If she wants to regulate her pregnancy so as to have it once every two years, then given the approval of her husband, it is permissible for her to use contraceptives as long as their use does not harm her. The Sahabah used to perform Coitus Interrupts  and they were not prevented (i.e., by the Prophet-صلى الله عليه و سلم). This method involves regular sexual intercourse with the wife except at the time of ejaculation, the husband pulls out and ejaculates outside the private part of the woman.
 Narrated Jabir: “we used to practice Coitus Interrupts during the life of time of Allah’s Messenger (صلى الله عليه و سلم)”. Collected by Al-Bukhari in his in Saheeh (Arabic-English) V.7, P.102
Posted from : [eBook] Natural Blood of Women – Shaykh Uthaymeen – Translated by Dr Saleh As-Saleh
Also read : Birth Control & Family Limitation (of offspring) – Shaykh al-Albaani