Conception, Obstetrics and Gynecology FAQ

Determining Paternity and Pregnancy Timeline: Key Questions Answered

Calculating the Estimated Due Date (EDD) Hello Doctor, I would like to ask a few questions. My menstrual cycle is about 31-32 days, and my last period was on December 27. I expect to ovulate around January 13-14, so I had unprotected intercourse with Male A from January 12-14 (I ...

Dr. Cao Guotao Reply:
Hello, based on the size observed in the ultrasound, it is possible that it is a male fetus. However, since you have been using contraception, it is difficult to say for certain. As for whether everything is normal, it will require monitoring. Wishing you good health.

Understanding Conception Dates: A Guide for Women

I would like to confirm the date of conception? Hello Doctor: My menstrual cycle is 30 to 33 days, with my last menstrual period starting on 10/28, 11/30, and 12/31, lasting about 7 days and ending on 1/17. I had sexual intercourse without contraception on 1/26 and 1/28, with wit...

Dr. Cao Guotao Reply:
Hello, it is more likely to be around the middle of the month, and less likely at the end of the month. Wishing you good health.

Prolonged Bleeding After Abortion: What You Need to Know

The bleeding from the abortion has not yet stopped? Dear Doctor, my baby had a miscarriage at eight weeks, and I underwent a dilation and curettage (D&C) on January 11. After returning home, the bleeding was minimal, just a few drops, and there was no blood when I wiped after...

Dr. Cao Guotao Reply:
Hello, you had surgery on January 11, and there is still bleeding on January 29. It is possible that there may still be retained products of conception. It is recommended to return to your original obstetrics and gynecology clinic for an examination. Wishing you good health.

Calculating Conception Date Based on Due Date and Irregular Menstrual Cycle

Pregnancy date Hello, doctor. I would like to inquire about my pregnancy. My due date was December 31, 2021, but my baby was actually born on December 16, 2021, at 37 weeks and 6 days. Could you help me estimate the conception date? I'm not sure about the last day of my mens...

Dr. Zhang Kunmin Reply:
Hello, based on your description, if a pregnant woman has irregular menstrual cycles, the estimated due date and gestational weeks are often inaccurate. Consequently, the estimation of the conception date may also have a greater margin of error, which can lead to unnecessary conc...

Understanding Conception Dates Based on Ultrasound and Menstrual Cycle

Possible date of conception Hello doctor, I would like to ask about the ultrasound examination. The first day of the last menstrual period was on January 15, and the estimated due date is October 22. The ultrasound on March 13 showed 8 weeks and 1 day with a crown-rump length (CR...

Dr. Zhang Kunmin Reply:
Hello, the error in calculating the gestational age based on the weeks of pregnancy can be significant. For individuals who engage in frequent sexual activity, it is not advisable to use this method for calculation, as it often leads to unnecessary disputes. Thank you! Wishing yo...

Understanding HPV Infection: Safe Practices and Pregnancy Planning

Infection with the HPV virus? Hello Doctor, I recently tested positive for HPV type 56 and have scheduled a biopsy. I would like to ask: 1. Is it safe to engage in sexual intercourse while infected with HPV? If so, besides using condoms, what else should I be aware of? (I compl...

Dr. Wu Xianghui Reply:
1. Using condoms is sufficient. 2. It does not affect normal fertility planning. After receiving the HPV vaccine, individuals cannot produce antibodies on their own, theoretically remaining carriers of the virus for life. 3. A single sexual partner is recommended. Males can also ...

Common Pregnancy Questions: Myths and Facts Explained

I have some questions related to pregnancy? Q1: Is it true that pregnancy cannot be detected externally within the first 12 weeks? If not, at what week can it be detected? Q2: If oral sex is performed, does the acidic environment of the vagina become ineffective? Q3: Generall...

Dr. Cao Guotao Reply:
Hello, pregnancy is usually noticeable around five months. Oral sex does not affect the condition of the vagina. Theoretically, as long as there are sperm present, there is a chance of conception. Wishing you good health.

Could I Be Pregnant? Understanding Late Periods and Conception Risks

Are you pregnant? On December 28, I had sexual intercourse, and my period was supposed to start on December 29. However, it is now January 1, and my period has not arrived. During intercourse, I did not use a condom but withdrew quickly, and there was no ejaculation. I have been ...

Dr. Zhang Kunmin Reply:
Hello, the questioner: There is a possibility of pregnancy even if ejaculation has not occurred during intercourse, as pre-ejaculatory fluid may contain sperm. Additionally, early pregnancy does not always present specific symptoms, and subjective symptoms cannot be used to make ...

Understanding Pregnancy Risks: Do You Need Emergency Contraception?

Can I get pregnant? Hello, doctor. Thank you for taking the time to review this question. I would like to inquire about the likelihood of pregnancy since I had unprotected intercourse with my boyfriend initially (the period tracking app indicates that I am currently in my fertile...

Dr. Zhang Kunmin Reply:
Hello, the questioner: There is a possibility of pregnancy even if ejaculation has not occurred during intercourse, as pre-ejaculatory fluid may contain sperm. It is best to use emergency contraception as a preventive measure, but its effectiveness is not 100%, with a failure rat...

Can Emergency Contraceptive Pills Cause Early Menstruation?

Emergency contraceptive pill Taking emergency contraceptive pills can cause your menstrual cycle to be altered, including the possibility of your period arriving a week earlier than expected. If you took the emergency contraceptive pill, Levonorgestrel, on December 13 and experie...

Dr. Cao Guotao Reply:
Hello, emergency contraceptive pills may cause irregular menstruation; it is advisable to monitor the situation. It is best to use preventive contraception beforehand. Wishing you good health.

Contraceptive Effectiveness of Condoms and Pregnancy Risks Explained

The effectiveness of condoms as a contraceptive method and the probability of pregnancy? Your girlfriend's menstrual cycle is approximately 28 days, with her last period occurring from December 18 to December 24. Overall, her menstrual cycle is relatively regular, with occas...

Dr. Zhang Kunmin Reply:
Hello, the questioner: There is a possibility of pregnancy even if ejaculation does not occur during intercourse, as pre-ejaculatory fluid may contain sperm. As long as there are active sperm in the vagina during the ovulation period, there is a chance of conception regardless of...

Should I Take Emergency Contraceptive Pills After a Risky Encounter?

Should I take birth control pills? After having intercourse with my boyfriend, the condom did not come out completely; half of it was inside and half was outside, and I am unsure if any semen leaked out. I usually keep track of my menstrual cycle, and although I know the chances ...

Dr. Wu Xianghui Reply:
1. For pregnancy concerns, please take a home pregnancy test or visit a gynecologist for examination and evaluation four weeks after your most recent sexual intercourse. 2. The menstrual cycle can be affected by various psychological and physiological factors. If your period is m...

Maximizing Your Chances: When to Conceive Before or During Ovulation?

To conceive, the chances are higher during the ovulation period rather than before ovulation? Doctor, my menstrual cycle in November was from November 12 to November 17, and in December it was from December 14 to December 19. The app indicates that my fertile window (ovulation) i...

Dr. Zhang Kunmin Reply:
Hello, based on your description, it is recommended to engage in intercourse on the day after ovulation, approximately on December 28, 30, and January 1. However, since there is only one cycle of data, the margin of error may be larger. Thank you! Wishing you peace and health. Dr...

Understanding Your Pregnancy Chances After Unprotected Intercourse

I would like to know the probability of getting pregnant? Hello, doctor. My last menstrual period was from October 23 to October 28, the one before that was from November 19 to November 24, and this time it was from December 18 to December 23. On the morning of the 23rd, I had a ...

Dr. Zhang Kunmin Reply:
Hello, the timing of ovulation may not necessarily be early or on schedule. There is still a chance of conception even if ejaculation does not occur during intercourse, as pre-ejaculatory fluid may contain sperm. It is best to consider emergency contraception, although its effect...

Can You Get Pregnant If You Have Unprotected Sex Before Your Period?

Will this lead to pregnancy? Having unprotected intercourse two to three days before your period, especially if he withdrew before ejaculation, generally has a lower chance of resulting in pregnancy. However, since your period is already two days late and your menstrual cycle typ...

Dr. Zhang Kunmin Reply:
Hello, the questioner: Due to your recent irregular menstrual cycle, this ovulation period may not necessarily occur early or on schedule. There is still a chance of conception even if ejaculation does not occur, as pre-ejaculatory fluid may contain sperm. It is recommended that ...

Impact of COVID-19 Diagnosis During Pregnancy on Mothers and Fetuses

The impact of a COVID-19 diagnosis during pregnancy on the fetus and the mother? I am an overseas worker (from Vietnam) and I recently discovered that I am 4 weeks pregnant. Due to the severe COVID-19 situation in Vietnam, I have a few questions for the doctor: 1. Will being di...

Dr. Cao Guotao Reply:
Hello, as long as the pregnant woman does not have any significant discomfort, it generally does not have an impact. Since the current gestational age is 4 weeks, we can only observe. Wishing you good health.

Can You Get Pregnant from Pre-Ejaculate During Foreplay?

Touching the prostate fluid with a finger inserted? Because my boyfriend had already released pre-ejaculate fluid, after he touched his own genitals, he then inserted his fingers into my vagina. Additionally, while I was not wearing underwear and he was, we rubbed against each ot...

Dr. Zhang Kunmin Reply:
Hello, based on your description, there is a possibility of pregnancy. As long as active sperm is present in the vagina during the ovulation period, there is a chance of conception regardless of the method of intercourse. Emergency contraception can be used to enhance contracepti...

Understanding Pregnancy Chances: Ovulation and Conception Explained

Probability of Pregnancy Hello, I am following up on my previous inquiry regarding #176375. Can you confirm if there are two situations in which pregnancy theoretically cannot occur, and what about during the ovulation period?

Dr. Cao Guotao Reply:
Hello, in medicine, there are no absolutes, only probabilities. Generally, the chances of pregnancy are low. Wishing you good health.

Preventing Corpus Luteum Rupture: Tips for Women with PCOS

Prevention of Luteal Rupture Hello Doctor, I recently learned that intense exercise before menstruation may lead to corpus luteum rupture. Some say that the period when the corpus luteum is most likely to rupture is from day 20 to 26 of the menstrual cycle, counting from the firs...

Dr. Cao Guotao Reply:
Hello, please be gentle during sexual intercourse; this can generally help avoid issues. Ovulation period is typically a time when conception is more likely to occur. Wishing you good health.

Determining Conception Date Based on Ultrasound and Menstrual Cycle

Date of conception Doctor: My due date is June 5th. During an ultrasound examination on November 20th, I was 11 weeks and 6 days pregnant. The first day of my last menstrual period was August 20th. I had unprotected intercourse on September 3rd, 4th, and 5th, and another instance...

Dr. Cao Guotao Reply:
Hello, your due date is June 5th, which means conception likely occurred around September 12th. Wishing you good health!

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