Hai sayang! Alhamdulillah, we're good! Buku pink tu mulai dari week 1 after birth, most hospitals akan pass it to you right after delivery or checkup pertama. A few of my mum friends say they started filling it in from the very first pediatrician visit, so don't worry if you dapat it a bit later, the important thing is to keep it updated regularly for your baby's vaccinations and health records ya!