Maxi dresses are great for pregnancy. On lighter fall days, pair with a light cardigan and your favorite sandals for an easy, inexpensive maternity outfit.
Wearing several layers ensures that you don't get cold, but also prevents you from getting overheated (very common due to your raging hormones) as you can remove them throughout the day as needed.
Recycle your summer wardrobe to save money and avoid buying frumpy maternity tops. Pair your favorite summer dresses with a warm cardigan and leggings to help you keep you and your bump warm in colder months.