Yes, it is possible to conceive a second baby even if your period is late after 28 days. While a regular menstrual cycle is typically around 28 days, it can vary from person to person. It's important to note that ovulation can occur at different times in the menstrual cycle, so even if your period is delayed, there may still be an opportunity for conception. If you are actively trying to conceive and your period is late, it's recommended to take a pregnancy test to determine if you are pregnant. If you're not pregnant and your period continues to be irregular or absent, it may be worth consulting with a healthcare professional to explore potential underlying causes.