While both Susten 300 and Susten SR 200 contain the hormone progesterone, they are not the same. Susten 300 delivers a 300 mg dose, whereas Susten SR 200 is a sustained-release formulation delivering a lower 200 mg dose. Because maintaining the precise dose prescribed by your doctor is essential for supporting your pregnancy right now, it is not safe to switch these medications on your own. Please reach out to your obstetrician before making any changes.

Susten 200, Nugest 200, and Hilgesterone 200 all contain the same active hormone, progesterone. While these brands are often equivalent, please do not substitute them without consulting your obstetrician first. It is very important to have your doctor evaluate this stomach tightness to ensure both you and your baby are safe, and to confirm if progesterone is the right treatment for this symptom. Please reach out to your healthcare provider for a quick check-up to keep you comfortable.

Susten 300 is a progesterone medication, and it is quite common for a withdrawal bleed to take up to 7 to 14 days to start after finishing the course. Since your pregnancy test is negative, this delay is likely just your body taking a little extra time to respond to the hormonal changes. I recommend waiting a few more days. If your period does not start within 14 days of stopping the medication, please reach out to your gynecologist for a simple evaluation.

Yes, if you are not pregnant, you will still get your period. After you finish your 10-day course of Susten (progesterone), your hormone levels will drop, which typically triggers a withdrawal bleed (your period) within 2 to 10 days. Since you ovulated on day 20, the best time to take a home pregnancy test is 14 days after ovulation (around day 34 of your cycle), or a day or two after completing your Susten course. This will give you the most accurate and reliable result.

Yes, Susten 200 SR (which contains progesterone) can absolutely cause your period to be delayed, as it naturally supports your uterine lining. Regarding pregnancy, while a negative test on day 27 is very reassuring, there is still a small chance of pregnancy if ovulation occurred later in your cycle than usual. I recommend waiting a few days and testing again with first-morning urine if your period does not start, or contacting your doctor for a definitive blood test.

Taking the prescribed Susten (progesterone) is very important right now. Progesterone is a natural hormone crucial for supporting your uterine lining and securing the pregnancy. Even light bleeding can sometimes suggest your body needs extra hormonal support to prevent a miscarriage. Susten is safe for your baby and is prescribed to protect your pregnancy during this delicate early stage. I gently encourage you to continue taking it as directed, but please share your feelings with your doctor to help ease your mind.

Along with your cervical stitch and bed rest, you might discuss switching your progesterone (Susten) from oral to vaginal administration with your doctor, as vaginal progesterone can be more effective locally. Additionally, stay well-hydrated, avoid any pelvic activity like intercourse, and monitor for signs of preterm labor, such as regular contractions or fluid leakage. Continue close follow-ups with your obstetrician or a maternal-fetal medicine specialist. Your medical team is there to support you and your baby every step of this journey.

Yes, Susten (progesterone) is safe and very commonly prescribed during pregnancy to support your body. An increase in thin, white vaginal discharge is a completely normal reaction. This discharge can be a direct side effect of the progesterone medication, which naturally increases secretions, and it is also a classic early sign of pregnancy itself due to rising hormone levels. Please rest assured that this is typically harmless and expected. However, if you notice any itching, burning, or an unusual odor, it is best to consult your doctor to rule out a mild infection.

Combined with your GMH and Progynova (estradiol) stimulation, and supported by Susten SR (progesterone) to help your uterine lining prepare for implantation, your chances of success are very encouraging. Typically, for a well-monitored, stimulated cycle at your age, the pregnancy success rate is around 15% to 25% per cycle. Try to stay relaxed and gentle with yourself during this two-week wait.

Yes, starting Susten SR 300 (which contains progesterone) on cycle day 15 can indeed delay your period. Progesterone works to support and maintain the lining of your uterus. While you are taking this medication, your hormone levels remain elevated, which typically prevents your period from starting. Usually, menstruation will begin a few days after you stop taking the medication, unless you are pregnant. This is a completely normal and expected effect, so please do not worry. Be sure to follow your doctor's exact guidance on when to stop the medication.