Hi.. I'm 33 yrs old. I'm already having a 7 yr old baby and trying for a second baby since last 2 yrs but couldn't conceive. Last 3 yrs back conceived but there is no heart beat in early trimester so it got aborted. I'm having hypothyroidism with tsh 4.5 and using thyronorm 50 mcg. My doctor suggested me to increase my thyroid dosage so now using thyronorm 75mcg and now doctor gave me folic acid, calcium and vitamin d3, mecolaz 1500 tablets.. and done with hsg test which is normal..  why calciumn vit d3 and mecolaz tablets used for conceiving?