Startedperiod 25 of dec had period 3 days was it safetot have sex on the 11 of january

Hi Fiona,

Probably not, but it all depends upon when you ovulate.

Normally that would be between days 11 and 16 of your cycle.  Day 1 is when your period starts.  You had sex on day 17.

The egg is viable, able to be fertilized for about 48 hours or so after ovulation - or until about day 18.

So, there is a chance.