Using
    birth control pills at first in case the marriage fails
Question

                Is it permissable for a woman to go
      on the pill (female contraception) prior to her marriage, so as to avoid pregnancy in case
      the marriage does not work out (ie. she becomes pregnant and then they divorce and she is
      left with the child)? Should she inform her spouse on the wedding night or prior to the
      nikkah that she is on the pill? In light of the above, is it permissible to use
      contraceptives to avoid pregnancy in the event that the marriage might not work out (ie
      for the first year of the marriage)?
Praise be to Allah.If it is medically proven that birth control pills are
    harmful to women, then it is not permissible to use them either before marriage or
    afterwards, on the basis of the rule that no harm should be done. This rule is based on
    the aayaat (interpretation of the meanings):
“And do not kill yourselves” [al-Nisa’ 4:29]
“and do not throw yourselves into destruction” [al-Baqarah
    2:195]
Unless it is possible to produce pills that are free of harmful side
    effects, they should not be taken.
As for using any non-harmful means of contraception at the beginning of
    marriage, fearing that the marriage may not work out, there are a number of reservations
    about this, such as:
it may be a kind of pessimism, because you are expecting it to fail.

It may lead to an unhappy marital life and both spouses expecting bad of
        one another, because it is known that one of the most important purposes of marriage is to
        have children, and if this is delayed for a specific reason the relationship may cool off.
        If the husband finds out that this is what his wife is doing, it will spoil the
        relationship between them.

Pregnancy is one of the most important functions of women, which
        generates feelings of love and compassion towards her husband and children. If pregnancy
        is prevented the opposite feelings develop.

The fuqahaa’ (may Allaah have mercy on them) stipulated the
        condition for ‘azl (coitus interruptus) or other forms of contraception used by the
        woman, that it should only be done with the permission of the other spouse, because both
        of them have the right to have children. So it is not permissible for the wife to take
        birth control pills without her husband’s permission and consent.

The fear that the marriage may fail and the fact that there is a high
        divorce rate cannot be dealt with in this manner. The way to deal with it is to make the
        right choice of spouse and make sure that this is the right choice. The prospective
        husband should be allowed to see the prospective wife, because this is one of the ways of
        fostering love after marriage. Other means should also be used. We ask Allaah to guide us
        all. May Allaah bless our Prophet Muhammad.