My grandmother had three children. The first was born at home in 1914, but the other two, born in 1920 and 1926 respectively, took place at 2 different private homes despite the fact the family was still resident at the original 1914 address.

I'm puzzled why the births took place somewhere other than the family home or a medical facility of some sort. Could they have been the homes of midwives? Any information on the likelihood of this possibility would be welcome.