I've heard several stories of where a couple that is having trouble concieving, due to the female partner , wanting to have a third person in the marriage to have kids. Usually the line goes:
*** " He loves his wife and because they can't have children she has permitted him to marry again "***
Now I know in Islam a Man is allowed to and that these are one of the reasons that he can have another wife .
However my question is would you marry someone like that , knowing that your role in that relationship may in the end be just that of a brood - mare ?
Considering there are other avenues open to the couple like adoption !
Concerning the ruling on polygamy per the Quran:
**"And if you fear that you cannot act equitably towards orphans, marry such women as seem good to you, two and three and four; but if you fear that you will not do justice between them, then marry only one or what your right hands possess: this is more proper that you may not deviate from the right course" (4:3).
**Towards ORPHANS. The Quran does not give the option for taking multiple wives because your wife cannot give birth. So no, men do not have the right to take any other wife because of it. They do however, have the right of divorce (though I would find no morality in doing so).
I would not allow my husband to take another wife due to my infertility. I wouldn't do this because 1. I do not accept that sort of betrayal, and 2. I would not condone him doing something which goes against Islam.
I would become a guardian to a child, or as in the USA-- adopt. There are millions of children that need loving parents in this world, why create more when you could save those that already exist?