That constant, unyielding “Holy Sh*T I gotta GO!” need to pee is one of the most common early symptoms of pregnancy that starts in the 1st trimester. For some mamas, this pressure, ahem, relieves itself once the uterus rises into your abdominal cavity during the 2nd trimester, although you may not notice that much relief. (Sorry.)

This whole pee “situation” is a result of the pregnancy hormone hCG, which increases the blood flow to your pelvic regions. While that blood flow can be linked to increased sexual pleasure (if you’re game for it, that is), it’s not so good for long car rides. HCG also increases blood flow to your kidneys, which become more efficient during pregnancy.

As your kidneys get better at their job, your body gets rid of waste quicker. Your expanding uterus is also to blame since it puts pressure on your bladder, giving it less room to store urine.

Just stay near a bathroom and you should be OK.

Of course, if you’re finding that your excessive need to pee is beyond excessive, phone your doc!