TTC after 2 miscarriages

April

Ok so I had one miscarriage after my first daughter, then I had my 2nd daughter, two years later I had another miscarriage and then after TTC for a year I got pregnant and then had another miscarriage..at my appointment the dr said they wanted to do some cultures and if they came back normal he wanted to do genetic testing, I guess im just curious after having two health babies if all of a sudden there could be something found in that testing? I hope that makes sense! It’s all new to me!