have a history of miscarriage at week 38, 1 early miscarriage, my period was 24 days late and I did not see the fetus, then I had a miscarriage. The third time I was pregnant, the doctor prescribed a lovenox injection and I gave birth to a baby girl. This time, I am pregnant for the fourth time, the doctor also prescribed a lovenox injection and now I am 10 weeks pregnant. Doctor, can I ask the doctor, pregnant women with a history of miscarriage should have a lovenox injection until which month of pregnancy?

I had 2 miscarriages. After the second time, I did a karyotype test and the results showed that I was heterozygous for PAI1, MTHFR, MTRR. I would like to ask, with a history of 2 miscarriages, what should I prepare for the next pregnancy?