Relationship Between Birth Weight Against Weight Gain 12 Months of Age in Babies at Lubuklinggau City

The baby's weight gain is very rapid, but the rate of weight gain is getting less and less. At the age of 5 months, a baby weighs twice his birth weight, while at 1 year his weight reaches three times his birth weight, and at 2 years his weight weighs four times his birth weight. The purpose of this study was to determine the relationship between birth weight and factors influencing weight gain at the age of 12 months in babies born at the midwife independent practice clinic (BPM) in Lubuklinggu City, South Sumatra Province in 2019. Sample of 108, research design cross sectional. The results showed there was a relationship between birth weight (p value = 0.001) and immunization status (p value = 0.017) to the baby's weight gain at 12 months of age.  Pertambahan berat badan bayi sangatlah pesat, namun laju pertambahan berat badan makin lama makin berkurang. Pada umur 5 bulan, berat badan bayi menjadi dua kali berat lahir, sedangkan pada umur 1 tahun beratnya mencapai tiga kali berat lahir, dan pada umur 2 tahun berat badannya menjadi empat kali berat lahir. Tujuan penelitian adalah untuk mengetahui hubungan antara berat badan lahir dan faktor-faktor yang mempengaruhi pertambahan berat badan usia 12 bulan pada bayi yang di lahirkan di klinik bidan praktek mandiri (BPM) di Kota Lubuklinggu Propinsi Sumatera Selatan Tahun 2019. Sampel sebanyak 108, desain penelitian cross sectional. Hasil penelitian menunjukkan terdapat hubungan antara berat badan lahir (p value = 0,001) dan status imunisasi (p value = 0,017) terhadap pertambahan berat badan bayi pada usia 12 bulan