Opinions needed

Lela

Had my daughter in october.

Wanting to have another baby.

We had difficulty in getting pregnant. I had a miscarriage before her.

I started my period 12/20 first one after my c section. Bleeding is starting to stop.

When should I start taking ovulation tests? I found this brand at Walmart(in green box), has anyone used them? Any success? And any tips that may help us?