Early pregnancy and clothes that still fit
Short answer: Choose soft fabric with stretch and waistbands that do not pinch. Most of an ordinary wardrobe can be worn on through the first months.
What changes first
The bust and waist change before the stomach becomes visible. That means bras and waistbands are the first things that bother you. Those are the two places you notice it first.
Waistbands rather than sizes
A soft, wide waistband that does not cut in lets ordinary trousers work for longer. Trousers with a knitted waistband and elastane move with you without pinching. See bamboo trousers for women.
Bras and underwear
A soft wireless bra is often more comfortable when the bust changes. Briefs with a soft edge and a little stretch move with you. See bamboo bras without underwire and bamboo underwear for women.
Frequently asked questions
Should you buy maternity clothes right away
Rarely in the first months. Soft clothes with stretch go a long way.
What about nausea and temperature
Many people feel colder or warmer than usual. Layers you can take off are the simplest answer.
Is there anything to avoid
Tight waistbands and hard seams against the stomach. For health questions, talk to your midwife or doctor.