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My sister,who is a housewife,delivered a baby.
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Hi,

My sister,who is a housewife,delivered a baby.

This is correct grammar.

In terms of meaning, most English speakers would understand this to mean that your sister helped a pregnant woman with the birth of that woman's baby. We say, for example, 'The doctor delivered a baby'.

If the baby was your sister's, the common expression is

'My sister,who is a housewife, had a baby'.

Best wishes, Clive
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Hi Anon

You need a space after each comma:
My sister, who is a housewife, delivered a baby.

Without context, I would interpret that sentence to mean that she delivered someone else's baby (i.e. not her own baby). Is that the meaning you intended?

I also can't help but wonder if you meant to say "midwife " rather than "housewife".
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Comments  
Hi,

Smart thought, about 'midwife'.

Clive
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My sister conveived