In my opinion, it is a lot more hard work bringing up a child full time as against going to work, so can never understand why young girls would want to be single parents just to obtain benefits to avoid work..
You never have any space, have to watch/cook/entertain/organise baby-sitters for any nights out, etc... even body space as they need nursing, climb all over you, holding hands when you venture outside (which takes ages to organise, as have a long list of items to take with you when under 3 years); the list is endless. No respite whatsoever. Although you do it for love naturally, any life of your own is spoken for.