Does Yaz Birth Control Cause Weight Gain? Concerns and Safety Tips - Obstetrics and Gynecology

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Birth control pills and body weight?


Hello, Doctor.
I would like to ask if Yaz birth control pills can cause weight gain.
I took them three months ago and gained 3 kilograms at that time, along with experiencing depression and mild itching in the vulva.
Recently, due to work requirements, I need to lose weight quickly! However, I feel very uneasy without the dual protection of birth control pills and condoms.
If my boyfriend touches his penis and then penetrates me, I get very anxious, worrying that there might be sperm in that fluid.
Although we always use condoms during intercourse, I still fear that they might break.
I have been controlling my diet and exercising, and today is the first day of my menstrual period.
I am hesitant about starting a new pack of Yaz.
I want dual contraception, but I am really afraid of gaining weight again.
Additionally, could you please tell me how many days after starting the birth control pills it is safe to have sexual intercourse? Thank you for taking the time to answer, Doctor.

Niming, 20~29 year old female. Ask Date: 2019/10/13

Dr. Huang Jianzhong reply Obstetrics and Gynecology


Yaz contraceptive pill may cause weight gain? Answer: Yes, it can lead to weight gain (I took it three months ago and gained 3 kg at that time, along with experiencing mild depression and slight itching in the vulva).
Recently, due to work requirements, I need to lose weight quickly! However, I feel very uneasy without the dual protection of birth control pills and condoms.
If my boyfriend gets an erection and touches his penis with bodily fluids before penetrating, I get very anxious, worrying that those fluids may contain sperm.
Even though we always use condoms during intercourse, I still fear that they might break.
I have been controlling my diet and exercising, and today is the first day of my menstrual period.
I'm hesitant about starting a new pack of Yaz.
I want dual contraception, but I'm really afraid of gaining more weight...
Answer: Using condoms is sufficient.
Additionally, could you please ask the doctor, how many days after starting the contraceptive pill is it safer to engage in sexual intercourse? Answer: It is safer to have sexual intercourse 7-14 days after starting the pill.

Reply Date: 2019/10/13

More Info


When it comes to the use of Yaz birth control pills and concerns about weight gain, it's important to understand both the potential side effects of hormonal contraceptives and the individual factors that can influence weight changes. Yaz, like many other combination oral contraceptives, contains hormones that can affect various bodily functions, including metabolism and fluid retention.
Weight Gain and Yaz:
While some users report weight gain while taking Yaz, research indicates that the average weight change associated with this contraceptive is minimal. In clinical studies, the weight gain reported was often within the range of a few pounds, and many users do not experience any significant changes in weight. However, individual responses to hormonal contraceptives can vary widely. Factors such as genetics, lifestyle, diet, and overall health can all play a role in how a person’s body reacts to these medications.

If you experienced a weight gain of 3 kilograms (approximately 6.6 pounds) during your previous use of Yaz, it could be attributed to hormonal changes, fluid retention, or other lifestyle factors at that time. It’s also worth noting that some women may experience mood changes, such as depression or anxiety, which can indirectly affect eating habits and physical activity levels, potentially leading to weight gain.

Concerns About Weight Management:
If you are currently focused on losing weight, it’s essential to approach this goal with a balanced diet and regular exercise. Engaging in physical activity and maintaining a healthy diet can help mitigate any potential weight gain from the pill. If you decide to start Yaz again, consider monitoring your weight closely and adjusting your diet and exercise routine as needed.

Safety Tips for Using Yaz:
1. Consult Your Healthcare Provider: Before starting Yaz or any other hormonal contraceptive, discuss your concerns about weight gain and any previous side effects with your doctor. They can provide personalized advice based on your health history.


2. Monitor Your Weight: Keep track of your weight regularly to identify any significant changes. If you notice an increase that concerns you, consult your healthcare provider for advice.

3. Healthy Lifestyle Choices: Focus on a balanced diet rich in fruits, vegetables, whole grains, and lean proteins. Regular physical activity is also crucial. Aim for at least 150 minutes of moderate aerobic exercise per week.

4. Stay Hydrated: Sometimes, weight gain can be attributed to water retention. Drinking plenty of water can help reduce this effect.

5. Be Mindful of Other Factors: Stress, sleep, and other lifestyle factors can also influence weight. Ensure you are managing stress effectively and getting adequate sleep.

When to Have Sex After Starting Yaz:
Typically, it is recommended to wait at least 7 days after starting Yaz before engaging in unprotected sex to ensure maximum effectiveness. If you start taking Yaz during the first five days of your menstrual cycle, you are protected from pregnancy immediately. If you start at any other time, use a backup method of contraception, such as condoms, for the first week.

In conclusion, while Yaz may cause weight changes in some individuals, it is not a universal side effect. If you are concerned about weight gain, consider discussing alternative contraceptive options with your healthcare provider. They can help you find a method that aligns with your health goals and lifestyle. Remember, maintaining a healthy lifestyle is key to managing weight effectively, regardless of your contraceptive choice.

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