Can you be pregnant if only had protected sex 3-4 days before a full 5 day period and no after but the next displays brown blood spots similar to implantation bleeding?

While it is possible to become pregnant even with protected sex, the likelihood is very low. Here's why:

1. Timing of Intercourse: Assuming you had protected sex 3-4 days before your full 5-day period, it's important to understand that ovulation typically occurs around day 14 of a regular 28-day menstrual cycle. If your cycle is longer or shorter, ovulation may happen earlier or later, respectively. Since you had protected sex a few days before your period, it is less likely that you were ovulating at that time.

2. Effectiveness of Protection: If the protected sex involved the proper use of condoms or contraceptives, they are highly effective in preventing pregnancy. Condoms provide a physical barrier that prevents sperm from reaching the egg, and hormonal contraceptives work by suppressing ovulation and thickening the cervical mucus, making it difficult for sperm to reach the uterus. If the protection was used correctly and there were no breakages or errors, the chances of pregnancy are significantly reduced.

3. Spotting after Menstruation: Brown blood spotting after a full 5-day period can occur for various reasons, and it's not necessarily a sign of implantation bleeding. Hormonal fluctuations, hormonal imbalances, or irregular menstrual cycles can all lead to spotting. However, if the spotting persists or is accompanied by other pregnancy symptoms, it's a good idea to take a pregnancy test to confirm.

4. Additional Factors: Other factors to consider include your overall health, medical history, and any underlying conditions that may affect menstrual patterns or fertility. If you have any concerns or are experiencing unusual symptoms, it is always advisable to consult with a healthcare professional for proper guidance and evaluation.

Remember, pregnancy is determined by the fertilization of an egg by sperm, which can only happen during ovulation. The timing of ovulation and the use of effective protection play significant roles in determining pregnancy chances. If you have any doubts or concerns, it's best to take a pregnancy test or speak to a healthcare provider to get accurate information.