Hi and welcome to HCM. Susten contains progesterone, However progesterone is not approved for use during pregnancy in any advanced country such as US, UK etc. Some authorities in the past used to recommend its use in recurrent miscarriage or threatened abortion but now there is now no evidence of any benefit from such practice and recommend against the use in early pregnancy unless there is proven deficiency. One problem with this medicine is that female baby may suffer from hirsutism (unwanted hair on face, chest etc). Therefore if at all progesterones have to be given when there is documented deficiency, it is preferable to give dydrogesterone (sold as Duphaston) or medroxyprogesterone (sold as Meprate). But most of obstetricians still prescribe this drug. Fertigyn contains choriogonadotrophin and is used to treat Anovulatory infertility. But according to your history you are pregnant and in pregnancy this drug is not given. This drug is contraindicated in women who are or may become pregnant. This you clarify with your doctor and if possible take a second opinion. Regards Dr santosh