Trimester 1 is 1 to 12 weeks
Breast changes are a normal part of pregnancy and occur as a result of hormonal fluctuations. This can begin as early as 1 week after conception. Some women may increase in size dramatically in their 1st trimester and not experience any more growth until their milk comes in, whereas others may continue to grow up until birth and beyond. Going up a cup size or two is normal for many women.
T1 Sizing Recommendation
Your breasts are likely to feel fuller, larger and heavier, so going up a cup size or two is completely normal during this time.
T1 Style Recommendation
In the first few weeks to months, breast tenderness is real, so we recommend looking for wireless and seamless styles.