I had it after all my kids, after my first child i used don't be bald and it worked well enough.
After my last two kids i was introduced to the wonderful world of hair board and concocted my own stuff
coconut oil
rosemary oil
eucalyptus oil
tea tree oil
chammomile oil
bergamot oil
and a dash of MSM
This can be applied as often as you like.
Also rosemary rinses helped as well
boil some fresh rosemary(or the dried one, but crush it a bit before you boil it up) and let it cool and steep, use as a rinse after you wash your hair