HI, Thanks for choosing HCM in your question you told but there is fetal viability is it fetal viability or no fetal viability ? reason for prescribing folic acid is for good development of fetus and to avoid neural tube defects(brain and spinal cord defects) The other is dydrogesterone duphaston it is orally active progestogen used treatment of recurrent pregnancy loss, and for prevention of preterm birth in pregnant women with a history of at least one spontaneous preterm birth. so in your case to avoid complications like miscarriage it is given so that hormonal imbalance gets corrected please continue dont worry ,dont let stress cause pregnancy loss go for next scan at scheduled time and talk to your doctor meanwhile you can continue the medication without doubt hope i answered your queries feel free to contact me for further queries thank you