Depois do banho, a Ana vai deitar a bebé.

In European Portuguese, it is very common to use the definite article before a person's first name: a Ana, o Miguel, a Sofia.

This does not mean the Ana in the way it would in English. It is just a normal feature of Portuguese, especially in everyday speech. In more formal writing, the article may sometimes be left out, but in Portugal a Ana sounds very natural.

Do is a contraction of de + o.

• depois de = after
• o banho = the bath

So:

• depois de o banho → depois do banho

Portuguese very often contracts prepositions with articles:

• de + o = do
• de + a = da
• em + o = no
• em + a = na

Because Depois do banho is an introductory time expression.

It sets the scene first, and then the main clause comes after it:

• Depois do banho, = time/background
• a Ana vai deitar a bebé. = main information

In English, this works similarly with phrases like After the bath, .... The comma helps separate the time phrase from the rest of the sentence.

Vai deitar is the construction ir + infinitive, which is very common in Portuguese for talking about the near future or an intended action.

Here:

• vai = present tense of ir
• deitar = infinitive

So vai deitar means something like is going to put ... to bed or will put ... to bed.

It does not literally mean that she is physically going somewhere in this sentence. It is a future expression.

Because here Ana is doing the action to the baby, not to herself.

• deitar alguém = to lay someone down / put someone to bed
• deitar-se = to lie down / go to bed oneself

So:

• A Ana vai deitar a bebé. = Ana is going to put the baby to bed.
• A Ana vai deitar-se. = Ana is going to go to bed.

That little -se changes the meaning a lot.

On its own, deitar can mean to lay down, to put down, or in some contexts to put to bed.

With a baby or child, deitar very often means to put to bed.

So in this sentence, it does not just mean physically placing the baby horizontally. It usually suggests the bedtime routine or settling the baby down for sleep.

The article shows the gender of the baby in this sentence.

• a bebé = the baby, female
• o bebé = the baby, male

So this sentence is talking about a girl baby.

In Portuguese, bebé can be used for either sex, and the article tells you which one is meant.

Yes, bebé is the usual European Portuguese spelling.

In Brazilian Portuguese, the spelling is normally bebê.

So this sentence clearly looks European Portuguese:

• Portugal: bebé
• Brazil: bebê

A useful breakdown is:

• Depois do banho = time phrase
• a Ana = subject
• vai deitar = verb phrase
• a bebé = direct object

So the structure is basically:

Time expression + subject + verb + object

That is a very normal word order in Portuguese.

The phrase itself does not specify whose bath it is.

Grammatically, do banho just means after the bath. You understand whose bath it is from context.

In real life, if people are talking about a baby's routine, many listeners would assume it means after the baby's bath. But the sentence alone does not force that interpretation.

Yes, that is possible, especially in some written styles. But in European Portuguese, a Ana sounds more natural in everyday language.

So:

• A Ana vai deitar a bebé. = very natural in Portugal
• Ana vai deitar a bebé. = possible, but slightly less everyday/conversational in European Portuguese

More or less in meaning, yes, but not in style.

You could also say something like:

• A Ana deitará a bebé.

That is the simple future. It is grammatically correct, but in everyday spoken Portuguese people much more often use ir + infinitive:

• A Ana vai deitar a bebé.

This sounds more natural and conversational.