What to wear?
As your belly begins to grow, you will need to adjust your clothing. This may involve just continuing to wear stretchy clothes you already own or borrowing or purchasing special maternity clothes. (You may even start to try on your partners clothes for size!)
While all women's bodies change differently during pregnancy, generally your growing uterus and baby do not start to move out of your pelvis until about 12 weeks of the pregnancy and most women will get away with wearing their normal clothes until then. By about 14 to 16 weeks of the pregnancy, your belly will slightly protrude, but it may still just be just a case of wearing looser or more elasticised pants and skirts. From about 18 to 22 weeks of pregnancy, you will definitely 'pop out' and as your waistline thickens, your clothes will need to accommodate this to maintain your comfort.
Also, during pregnancy your body temperature increases. Therefore, wearing light, breathable clothing (made of cotton or wool) and possibly a few layers of clothing during the cooler months will assist you in maintaining your comfort, making it easier to adjust to being indoors, outdoors or in air-conditioned environments.
What to wear?
Underwear
Shoes
What you choose to dress in during your pregnancy can be as glamorous, gorgeous, sexy, corporate, formal, relaxed or casual as you choose it to be. It will tend to come down to your own individual taste and how you are feeling about your body. Other factors to consider are the country you live in, the season of the year you will be heavily pregnant through and the appropriate dress code for work, study or special occasions.
Your clothing needs will determine how extensive your maternity wardrobe will be. However, even if you do need clothes for work and home, you don't always need to spend a fortune on purchasing a whole new wardrobe. In many cases you can buy a few mix and match items to stretch out your attire in an effective way.