Ay, mama, brown spotting sa first day ng cycle ay usually normal lang, pero dahil first day pa lang siya, best na i-monitor mo muna. Kung tumatagal ng matagal, dumaraming dami, o may ibang symptoms like cramping na sobrang sakit, mas mabuti na makita mo ng doctor para sure tayo. A few of us moms dine-describe yan as old blood lang talaga, pero peace of mind is always better, di ba? Keep an eye on it!