I had a huge indicator that my cycle had returned while breastfeeding DD1 - a positive pregnancy test. I was feeding full time and DD1 was only 10 weeks old when my cycle kickstarted.

With DD2 my cycle didn't return until I stopped feeding her at about 5 months, despite me having gone on the mini pill (which I hated)

I flat out refuse to take any form of oral contraception anymore so this time around we're not taking any chances - DH is booked in for the snip and until then he is gazing at me longingly from across the bedroom ;-)