Imagine being barren in a society where infertility is a virtual taboo and carrying on the family line is all important.

You have a husband and home, but feel ashamed and worthless because when you die, your name will be forgotten.

While the west looks to doctors and test tubes to overcome childlessness, many communities in Africa take an approach closer to home.

Here in Kenya, a woman who cannot conceive can simply marry another woman who is single and able to have children.