At gestation sac diameter of 22.4 the size of embryo is expected to be around 4 mm and cardiac activity is expected. Mox 500 is an antibiotic. But the outcome of your pregnancy is determined by your nutritional status and hormonal balances.
Next Steps
Get fasting
sugar,
TSH and FT4
vitamin D , CBC and blood group, urine ME done. Corrections of the problems is desired. Progesterone support with oral natural micronised brands is desirable. After few days repeat an USG pelvis.
Health Tips
Normally a healthy sacrifice grows at the rate of 1 mm per day. Decide accordingly.