Does pregnancy weaken your immune system?

Question

When you are pregnant is your immune system weaker?

and, can this cause your lymph nodes to swell a bit?

Answer 1

Not sure about the lymph nodes but your immune system is weakened slighty for sure.  Your body is working on overdrive to look after a new life and that's your body's priority - baby comes first!  It's quite normal to have a bit of a cold and breakouts during your first trimester.  My nose drips like a tap for a good couple of weeks!!!

Answer 2

Your immunity is a bit lower during pregnancy. Your lymph nodes swell when you are fighting infection - if you have an infection, you may notice swollen lymph nodes.