How do l say :"'Congratulations to you of your three months old baby girl" in Japanese

Question

Answer

I think Kaoru-san is right. ご 出産 おめでとう ございます。（go shussan omedetou gozaimasu.） This is a polite way. The case of a friendly relationship・・・like this way.出産 おめでとう～！＾＾ （shussan omedetou～！＾＾） Do you use this sentence in the letter to your Japanese friend? You will surely be able to deliver your feelings to your friends. ＾＾

Answer

赤ちゃんお誕生3ヶ月おめでとうございます！

かな？

でも、日本人は、こういう言い方はしません。
日本人は、単純に

ご出産おめでとうございます

です。