Il pediatra spiega quando svezzare il bambino.

Yes. Il is the masculine singular definite article, meaning the.

In il pediatra = the pediatrician.

A few useful points:

• il is used before most masculine singular nouns.
• You often see articles in Italian more regularly than in English.
• Here it identifies a specific pediatrician, or the pediatrician in a general real-life context.

Good question. Pediatra is one of those Italian nouns that can refer to either a man or a woman, even though it ends in -a.

The article usually tells you the gender:

• il pediatra = a male pediatrician / the pediatrician (male)
• la pediatra = a female pediatrician / the pediatrician (female)

So in this sentence, il pediatra tells you the pediatrician is male.

Because Italian usually does not need subject pronouns when the verb ending already shows who is doing the action.

Here:

• spiega = explains
• From context and the verb form, the subject is il pediatra

Italian commonly omits pronouns such as io, tu, lui, lei, noi unless they are needed for emphasis or clarity.

So:

• Il pediatra spiega... = The pediatrician explains... not
• Il pediatra lui spiega... unless you want unusual emphasis

Spiega is the third-person singular present of spiegare (to explain).

So:

• io spiego = I explain
• tu spieghi = you explain
• lui/lei spiega = he/she explains

The sentence uses the present tense because it is describing what the pediatrician explains. Depending on context, English might translate it as:

• The pediatrician explains when to wean the baby or sometimes
• The pediatrician is explaining when to wean the baby

Italian present tense often covers both the simple present and, in the right context, the present progressive idea.

The subject is il pediatra because it comes first and agrees with the verb spiega.

The object of svezzare is il bambino:

• svezzare il bambino = to wean the baby/child

So the structure is:

• Il pediatra = subject
• spiega = main verb
• quando svezzare il bambino = what is being explained

In other words, the pediatrician explains when to wean the child.

Quando svezzare il bambino is a very common Italian structure: question word + infinitive.

It works like English:

• when to wean the baby
• how to do it
• what to say

So:

• quando svezzare il bambino = when to wean the baby

This structure is used when the sentence expresses an indirect question or embedded question, and the action is still in a general infinitive form.

Other possible forms exist, but they mean slightly different things:

• quando si svezza il bambino = when a baby is weaned / when one weans the baby or when do you wean the baby?, depending on context
• quando svezzarlo = when to wean him, where -lo replaces il bambino

The version in your sentence is the most straightforward full form.

Svezzare means to wean, especially in the sense of stopping exclusive milk feeding and introducing other foods.

In childcare contexts, it often refers to:

• introducing solid or semi-solid foods
• the weaning process in infants

So svezzare il bambino means to wean the child / to start the baby on solid foods, depending on how the idea is expressed in English.

Italian often uses the full noun when introducing or clearly identifying the object.

So:

• svezzare il bambino = to wean the baby

Once the baby is already clearly established, Italian could use a pronoun:

• Il pediatra spiega quando svezzarlo.
• literally: The pediatrician explains when to wean him

Here, using il bambino is clearer and more explicit, which is very natural.

Yes, but it changes the meaning.

• il bambino = the baby / the child, a specific one
• un bambino = a baby / a child, more general

So:

• Il pediatra spiega quando svezzare il bambino suggests a particular child
• Il pediatra spiega quando svezzare un bambino sounds more general, like advice about babies in general

The given word order is the most natural and neutral:

Il pediatra spiega quando svezzare il bambino.

Italian word order is fairly flexible, but changes often add emphasis or sound less neutral.

For example:

• Quando svezzare il bambino, lo spiega il pediatra.
  • This puts emphasis on when to wean the baby
• Il pediatra quando svezzare il bambino lo spiega.
  • Grammatically possible in some spoken/emphatic contexts, but less standard as a basic example

For learners, the original order is the best model.

Yes, that is a very helpful way to see it.

The sentence breaks down like this:

• Il pediatra = the subject
• spiega = explains
• quando svezzare il bambino = an indirect question, functioning as the content of what is explained

So the whole sentence is basically:

• The pediatrician explains [when to wean the baby].

That bracketed part works as a single idea after spiega.

Only the article would change:

• La pediatra spiega quando svezzare il bambino.

Everything else stays the same.

That is because pediatra can be masculine or feminine, and the article shows which one it is:

• il pediatra = male pediatrician
• la pediatra = female pediatrician