Progesterone: Side Effects and Pregnancy Chances Explained

Questions about progesterone?

Hello Dr.
Tsao, I administered the ovulation trigger on February 4th and started taking progesterone on February 6th.
Until yesterday, February 13th, I experienced almost no side effects, but today, for some reason, I suddenly feel very unwell, almost fainting, and have been feeling lethargic all day.
Is this normal? Additionally, I had an ultrasound on February 13th, and the endometrial thickness was 1.4 cm.
Is there a possibility of pregnancy with this measurement? Thank you for your response.
^^

Miss Hsieh, 30~39 year old female. Ask Date: 2016/02/14

Dr. Cao Guotao reply Obstetrics and Gynecology

Hello, taking progesterone can sometimes make you feel drowsy.
If you're wondering about pregnancy, it might be best to wait a bit longer.
Wishing you good health!

Reply Date: 2016/02/14

More Info

Hello! Thank you for your question regarding the use of progesterone during pregnancy and its potential side effects.
Progesterone is a hormone that plays a crucial role in maintaining pregnancy. It is often prescribed to women who have low progesterone levels or are experiencing complications such as uterine bleeding. In your case, starting progesterone after ovulation can help support the uterine lining, making it more conducive for implantation if fertilization occurs.

Regarding your experience of feeling faint and lethargic after starting progesterone, it is not uncommon for some individuals to experience side effects when taking hormonal medications. Common side effects of progesterone can include fatigue, dizziness, mood swings, and headaches. These symptoms can sometimes mimic early pregnancy signs, which can be confusing. However, if you feel excessively dizzy or faint, it is essential to consult your healthcare provider to rule out any serious issues.

As for your ultrasound results showing an endometrial thickness of 1.4 cm, this measurement can be indicative of a receptive uterine lining, which is a positive sign for potential implantation. Generally, a thicker endometrial lining is associated with a higher chance of pregnancy, as it provides a suitable environment for a fertilized egg to implant. However, it is important to remember that many factors influence the chances of conception, including the timing of ovulation, sperm health, and overall reproductive health.

In terms of your question about the likelihood of pregnancy, while a thickened endometrial lining is a good sign, it does not guarantee pregnancy. The best way to confirm pregnancy is through a blood test or a home pregnancy test after a missed period.
If you have concerns about the side effects you are experiencing or the potential for pregnancy, it is crucial to maintain open communication with your healthcare provider. They can provide personalized advice based on your medical history and current situation.

In summary, progesterone is an essential hormone for supporting early pregnancy, and while side effects can occur, they vary from person to person. Your endometrial thickness is promising, but further testing will be necessary to confirm pregnancy. Always consult your healthcare provider with any concerns or unusual symptoms you experience during this time. Wishing you the best of luck on your journey!

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