Patient's question:
Sure, here is the translation of the content you provided:```
No
```
Doctor's answer:
After cohabitation, the embryo starts to implant 7 days later, and it takes about 10 days to complete implantation. Then it stimulates the trophoblast cells to secrete HCG. Therefore, you can determine whether you are pregnant by checking the HCG level in your blood 10 days after cohabitation.