Pregnancy Chances After Unprotected and Protected Intercourse - Obstetrics and Gynecology

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When assessing the chances of pregnancy after both unprotected and protected intercourse, it's essential to consider several factors, including the timing of the menstrual cycle, the nature of the sexual activity, and the effectiveness of contraceptive methods used.

Based on your description, your last menstrual period started on March 3, with subsequent cycles on March 30 and April 29. If we assume a typical cycle length of around 28-30 days, your next expected period would likely be around May 29. Engaging in sexual activity on May 28, which is the day before your expected period, places you in a situation where the likelihood of pregnancy is influenced by several factors.

1. Timing of Intercourse: The timing of ovulation is crucial in determining the chances of pregnancy. Ovulation typically occurs about 14 days before the start of your next period. If your cycle is regular, ovulation would likely have occurred around mid-May. Since you had unprotected intercourse just before your expected period, it is possible that sperm could still be viable if ovulation occurred later than expected.

2. Use of Condoms: You mentioned that you initially had unprotected intercourse but then used a condom for the remainder of the sexual activity. If the condom was used correctly and did not break, the risk of pregnancy from that portion of the encounter is significantly reduced. Condoms are about 85% effective with typical use, meaning that while they are not foolproof, they do provide a substantial level of protection against pregnancy when used correctly.

3. Symptoms of Pregnancy: You noted experiencing breast tenderness and lower abdominal discomfort, which can be early signs of pregnancy. However, these symptoms can also be associated with premenstrual syndrome (PMS) or other hormonal changes that occur in the luteal phase of your cycle. It is not uncommon for women to experience similar symptoms before their period.

4. Waiting for Your Period: Since your period is expected imminently, it is advisable to wait a few days past your expected date to see if your period arrives. If your period does not come, taking a home pregnancy test can provide clarity. These tests are most accurate when taken after a missed period.

5. Consulting a Healthcare Provider: If you continue to feel anxious about the possibility of pregnancy or if you have any unusual symptoms, it may be beneficial to consult with a healthcare provider. They can offer personalized advice and may recommend a blood test for pregnancy, which is more sensitive than home tests.

In summary, while there is a possibility of pregnancy given the timing of your sexual activity, the use of condoms significantly reduces that risk. Pay attention to your body and consider taking a pregnancy test if your period does not arrive as expected. Remember that stress and anxiety can also affect your menstrual cycle, so try to manage your stress levels as you await your period.