Effectiveness of Saliva Crystal Observation and Basal Body Temperature for Contraception
Saliva contraception I have seen products available for purchase that claim to determine ovulation periods by observing saliva crystals. What is the effectiveness of this method for contraception? Additionally, how effective is using basal body temperature measurement for contrac...
Dr. Peng Yiguo reply Obstetrics and Gynecology
With advancements in technology, there are now compact electronic thermometers and predictive devices designed to monitor hormonal changes before and after ovulation, including the crystallization of saliva that occurs near the ovulation period. These tools are convenient and all...[Read More] Effectiveness of Saliva Crystal Observation and Basal Body Temperature for Contraception
Understanding Male Vasectomy: Scarring and Recovery Time Explained
Issues related to sterilization? Hello, doctor: Will male sterilization leave a scar? How long will the wound take to heal? Thank you for your response.
Dr. Peng Yiguo reply Obstetrics and Gynecology
Male sterilization can be performed by palpating the vas deferens on either side of the scrotal wall. The incision is approximately 0.5 centimeters and can also be made from the bottom of the scrotum, resulting in only one incision. Generally, it does not leave a scar, and the in...[Read More] Understanding Male Vasectomy: Scarring and Recovery Time Explained
Understanding Pregnancy Tests: Positive Results Despite Menstrual Bleeding
Menstruation has occurred, but the pregnancy test shows a positive result? Hello Dr. Peng, my girlfriend recently took a pregnancy test, and the result was positive. However, she still had her period at the time of the test. Her menstrual cycle is very irregular, with periods las...
Dr. Peng Yiguo reply Obstetrics and Gynecology
Patients with lupus erythematosus who are taking corticosteroids may indeed experience changes in their menstrual cycle, including the amount and duration of menstruation. Regarding the menstrual period from October 14 to 25, it is questionable whether it was a true menstrual flo...[Read More] Understanding Pregnancy Tests: Positive Results Despite Menstrual Bleeding
Can I Get Pregnant? Understanding Risks and Emergency Contraception
Will this situation lead to pregnancy? My last menstrual period started on the 25th of last month. On the 14th of this month, I had unprotected intercourse with my boyfriend before putting on a condom at ejaculation, and the same situation occurred on the 19th. My menstrual cycle...
Dr. Peng Yiguo reply Obstetrics and Gynecology
Because your menstrual cycle is not very regular (28 to 35 days), if you have a 28-day cycle, there is likely no chance of pregnancy from intercourse on September 14 and 19. However, if your cycle is 35 days, intercourse on September 14 or 19 could coincide with your ovulation pe...[Read More] Can I Get Pregnant? Understanding Risks and Emergency Contraception
Understanding Amenorrhea: Why Your Period Might Be Missing and What to Do
MC has not come for a long time? Since last July, I haven't had my period, and I'm not pregnant. My health is good, so why hasn't it come? What should I do?
Dr. Peng Yiguo reply Obstetrics and Gynecology
Based on the information provided, prior to July of last year, menstruation was likely normal, indicating secondary amenorrhea. If there is no pregnancy, a progestin injection or oral progestin can be administered for three to four days, followed by observation for any uterine bl...[Read More] Understanding Amenorrhea: Why Your Period Might Be Missing and What to Do
Is It Safe for Pregnant Women to Soak in Hot Springs?
Pregnancy contraindications If you are about three months pregnant, it is generally advised to avoid hot springs. While sitting in a hot spring without engaging in vigorous activities may seem safe, the high temperatures can pose risks to both you and your developing baby. It is ...
Dr. Peng Yiguo reply Obstetrics and Gynecology
During pregnancy, soaking in a hot spring is generally safe except for the first and last month; however, it is advisable not to stay in for too long, especially avoiding direct pressure on the pregnant belly. Safety precautions should also be taken to prevent slipping. In fact, ...[Read More] Is It Safe for Pregnant Women to Soak in Hot Springs?
Can Saliva Harm Sperm and Cause Birth Defects? Expert Insights
Hello, doctor. I would like to ask you a question? Hello, doctor: May I ask if the components of saliva can damage sperm? If an egg combines with sperm contaminated by saliva, could it result in a malformed fetus? Thank you for your response, doctor.
Dr. Peng Yiguo reply Obstetrics and Gynecology
The components of saliva do not harm sperm; in fact, semen is even thicker than saliva. After ejaculation, semen undergoes liquefaction within 30 to 40 minutes, facilitating easier motility of sperm. Both the oral cavity and the vagina contain normal flora. When sperm enter the u...[Read More] Can Saliva Harm Sperm and Cause Birth Defects? Expert Insights
Understanding Lower Abdominal Pain: Causes and When to Seek Help
Lower abdominal pain? Dear Doctor, Recently, I've started experiencing bladder pain at work, but there is no blood in my urine. What should I do? I sometimes feel sharp pain in my lower abdomen near the ovaries, but there hasn't been a significant increase in discharg...
Dr. Peng Yiguo reply Obstetrics and Gynecology
Girls who are busy with work often hold in their urine or do not drink enough water, which can easily lead to urinary tract infections. Symptoms include frequent urination, urgency, and a burning sensation. In severe cases, there may be hematuria. Regarding pain in the bladder ar...[Read More] Understanding Lower Abdominal Pain: Causes and When to Seek Help
Can You Get Pregnant Without Intercourse? Myths About Virginity and Conception
Hymen and Pregnancy 1. My boyfriend and I do not engage in formal sexual intercourse; we experience the sensation of sex through our clothing. I wear underwear, and my boyfriend wears athletic shorts while simulating sexual activity. Is it possible for sperm to pass through the f...
Dr. Peng Yiguo reply Obstetrics and Gynecology
Generally speaking, sexual intercourse without ejaculation in the vagina is unlikely to result in pregnancy. Therefore, even with ejaculation during clothed rubbing or fondling, the semen is likely to coagulate, leading to sperm death. Cases of pregnancy occurring without the rup...[Read More] Can You Get Pregnant Without Intercourse? Myths About Virginity and Conception
Menstrual Delay: Understanding Causes When Pregnancy Tests Are Negative
Not coming at all? Your period is 18 days late, and a pregnancy test has come back negative. You have taken medication to induce menstruation, but it has been 7 days and you still haven't gotten your period. What could be the issue?
Dr. Peng Yiguo reply Obstetrics and Gynecology
If your period is overdue and you have not used any contraception, the first thing to consider is whether you might be pregnant. A negative pregnancy test only indicates that the hormone levels may not be high enough to detect pregnancy at this time. Therefore, unless your period...[Read More] Menstrual Delay: Understanding Causes When Pregnancy Tests Are Negative
Can Acquired Achondroplasia Occur? Risks for Newborns Explained
Is there such a condition as acquired chondrodysplasia? A friend of mine seems to have what is known as achondroplasia, but I heard that it is acquired later in life. Is that possible? Now he has had a baby, and I wonder what the likelihood is that this baby will have the conditi...
Dr. Peng Yiguo reply Obstetrics and Gynecology
Achondroplasia is a hereditary congenital skeletal dysplasia that is inherited in an autosomal dominant manner. However, over 80% of cases are due to mutations, which are associated with advanced paternal age. The incidence rate is approximately 4 to 14 per 100,000 births. The fu...[Read More] Can Acquired Achondroplasia Occur? Risks for Newborns Explained
Understanding Weight Gain Before Menstruation: Causes and Concerns
Weight gain? Hello, doctor! Why do I have an increased appetite before my period, feeling unsatisfied after eating, which leads to weight gain, and then my weight returns to normal after my period ends? Is this considered a problem? I got my first period in the ninth grade; at wh...
Dr. Peng Yiguo reply Obstetrics and Gynecology
1. The period following ovulation is referred to as the luteal phase. During this time, there are changes in carbohydrate metabolism and glucose tolerance, which can lead to a diabetic effect, resulting in increased appetite. Weight gain during this phase is partly due to fluid r...[Read More] Understanding Weight Gain Before Menstruation: Causes and Concerns
Why Is There Blood on Toilet Paper After Intimacy?
Why is there blood on the toilet paper? Doctor, may I ask: why is it that after my girlfriend and I have sex, when she wipes with tissue, there is blood on the tissue even though she didn't wipe hard? Could it be that we are being too rough?
Dr. Peng Yiguo reply Obstetrics and Gynecology
The vagina itself is a highly elastic reproductive canal, and simple sexual intercourse is unlikely to cause vaginal bleeding. However, inflammation of the external genitalia can lead to mucosal fragility, and friction during intercourse may result in slight bleeding. For example...[Read More] Why Is There Blood on Toilet Paper After Intimacy?