Support your growing baby bump with our maternity swimwear. Swim with the right assistance and learn which type of swimsuit fits your bump. Maternity one-pieces, maternity bikinis, or maternity tankini. Maternity one pieces are the easiest style to find, and can be used throughout your pregnancy. Stretching material and built-in shelf bra. Show off your bumps, emphasize your legs with a maternity bikini, or compromise between the two styles and settle for a glamorous maternity tankini.