Hello everyone! I am 25, a SAHM with a 3 (almost 4) year old daughter. We had her unexpectedly but we are now trying for our second. I have been tracking everything for 3 months now, and I was wondering how accurate the fertile window is? It's amazing how much you can learn about yourself tracking these things. We tried one day last month randomly, but this month, we are trying vigorously every day that it shows fertile. My husband has hypothyroidism and a low T count.. We haven't had his sperm count tested. He isn't on testosterone therapy thank goodness.. But hoping he isn't having any count issues. I'm nervous/ anxious about it.. But hopeful and excited as well. Our daughter wants a little sister so bad.. Tried explaining we can't pick which one and she said, "that's okay, you can go to HEB (a local grocery story) and get a sister." They are just too precious sometimes.