Baby Carrier

Hai mommies.. I'd some issue regarding use of baby carrier.. Is it okay for baby under 4months wear baby carrier.. Even though I had checked the instruction on the packaging of the baby carrier, it said 3m+.. Ada negatif effect x pada baby yg bawah 4m ni.. jadi paranoid pulak bila tgk anak ddk dalam baby carrier tu hehee. Tq😁