I would assume they relax and stretch along with the uterus, since the uterus is a muscle as well. In certain cases though you can have a diastasis recti which is when the most outer layer of muscle splits in the middle and this can cause what looks like a valley in the abs later on after baby is born.
The Eastern Time (ET) or Eastern Standard Time (EST) is also known as North American Eastern Standard Time. It is the time zone that pertains to the east coast of North America. The clock time in the Eastern Time is based on the mean solar time of the 75th meridian west of the Greenwich Observatory in London.
This time zone converter lets you visually and very quickly convert EDT to EST and vice-versa. Simply mouse over the colored hour-tiles and glance at the hours selected by the column... and done! EDT stands for Eastern Daylight Time. EST is known as Eastern Standard Time. EST is 0 hours ahead of EDT. So, when it is it will be. Other conversions: EDT to Phoenix Time, EDT to Kuala Lumpur Time, EDT to Perth Time, EDT to Helsinki Time.