我o係女仔............

first,此問題不應在性教育問,不過,我照答,
second,若你這樣已經叫問題,那我12years old,高174cm,我不是更有問題嗎?
third,根據我所知,導致此成因,有兩大原素
一.基因遺傳,基因遺傳是最主要原因之一,若你father or mother無此xx即身材矮小,則可能由grandfather or grandmother 等隔x遺傳,(我都有)
二.發育的早晚,每一個人的發育都有不同,人說男的發肓時間...是根據大多數人決定,不是必然的,你有可能是發育遲了一點

其實你都唔係有D 5正常,因為我現在得十二歲,我高138cm,重29kg,但係我去身體檢查,醫生話我標準,所以你唔洗敢害怕!

不用太緊張, 月經有早有遲, 13歲,有許多女孩都未有, 身型是比較矮小,有遺傳的, 但大把時間可增高. 反而月經如果早到,身高反而少了"標高"機會.

你己時都德啦

you are too short,
the height of a 13year-old girl
should be about 155~160cm
also, you are too light,
a 13year-old girl
should be about 38~42kg
but don't worry about M
I am 14years old now,
I still don't have M,
it is okay.....

I think you have some ploblems.Go to see a doctor.

慢慢等下啦

都ok啦, 才13啫...可等多一年半載