Genuine question

Im sorry if this comes out as rude but i have a genuine question. Okay so my uncles sister has had 5 kids but but her total pregnancies have been 12. Shes miscarriaged 7 times but she still keeps getting pregnant and miscarriages within two-three weeks of finding out. And on this app i see that a lot too. And my questions are if someone misscarries is there a greater chance that they will again. And why keep getting your hopes up of something as serious as this. I dont know how to word it but like does it give you more hope or youre not really counting on going through that again? Im asking cause ive seen how much she suffers and sad she gets but i feel that if that was me i wouldve stopped a long time ago, or at least not let it get to 7 miscarriages.