1
The baby needs to breastfeed.
To convey this, you can sign 'baby,' 'need,' and then use the sign for 'tit' or 'breast' while bringing your arms up as if holding a baby toward the chest to indicate nursing.
2
Breast cancer awareness is important.
You would sign 'tit' or 'breast,' followed by 'cancer,' 'awareness,' and 'important.' The sign remains neutral and clinical, making it perfectly appropriate for serious medical discussions.
3
The doctor checked her breast.
Sign 'doctor,' 'check,' and then use the cupped handshape to sign 'tit.' Maintain a professional, neutral facial expression to match the medical context of the sentence.