This week I will be blogging from the London Summit on Family Planning, organised by the UK government and the Gates Foundation. The ambitious aim is to provide family planning methods to an additional 120 million women worldwide by 2020. I have already blogged at length about this, so will simply give you all an impression of what this means for two  of the women I met on my recent trip to Kenya. Miriam is 32 years old and was at the Marura Village Dispensary in Laikipia District with her 3 month old son, Peter. She already has five girls at home and is struggling to keep them in school.…