If your lap has gotten warm from using your laptop for long periods, it is natural to wonder if this is somehow affecting your reproductive organs. The good news is that there is no real evidence to support this.
For ladies, the chances of your eggs being affected are unlikely as they are well protected in your ovaries, with the added protection of your pelvis around your uterus, fallopian tubes and ovaries. Hence, the quality of your eggs is unlikely to be affected.
As for men, you are constantly producing new sperm so there is no real cause for concern either! While in theory, long term exposure to heat can impair the production of sperm, there are no scientific studies that prove this.