Она беременна.

Because Russian usually omits the verb to be in the present tense.

So where English says:

• She is pregnant

Russian simply says:

• Она беременна

This is completely normal Russian grammar.

But in other tenses, forms of быть do appear:

• Она была беременна = She was pregnant
• Она будет беременна = She will be pregnant

No. Беременна is not a verb. It is a short-form adjective.

The full adjective is:

• беременная = pregnant

The short form used here is:

• беременна = pregnant, used as the predicate

So grammatically, Она беременна is something like:

• She [is] pregnant

where беременна describes the subject она.

The ending shows that the adjective is feminine singular, matching она.

Russian adjectives often agree with the noun or pronoun they describe.

Here:

• она = she
• беременна = feminine singular short-form adjective

So the form matches the feminine subject.

Related forms include:

• беременна = feminine singular
• беременны = plural

A masculine form беременен exists grammatically, but in literal everyday use pregnancy is normally talked about with feminine forms.

Yes, you may hear that in speech, but Она беременна is the more standard and compact predicate form.

Very roughly:

• Она беременна = standard, concise, very common
• Она беременная = also used, often more colloquial

The full form беременная is especially natural when it comes before a noun:

• беременная женщина = a pregnant woman

So for a simple statement, Она беременна is an excellent model to learn.

Usually, you just keep the same words and use question intonation:

• Она беременна? = Is she pregnant?

Russian often forms yes/no questions this way.

A more formal or bookish version is:

• Беременна ли она?

But for everyday conversation, Она беременна? is the normal pattern to learn first.

The neutral word order is:

• Она беременна

That is the most straightforward way to say it.

Russian word order is more flexible than English, so other orders are possible, but they usually add emphasis or special tone. For example:

• Беременна она can sound emphatic, contrastive, or context-dependent

So if you are learning, stick with:

• Она беременна

Use forms of быть in the past or future:

• Она была беременна = She was pregnant
• Она будет беременна = She will be pregnant

There is also an important difference between:

• Она будет беременна = She will be pregnant
• Она забеременеет = She will become pregnant / She will get pregnant

So будет беременна describes the state, while забеременеет describes the change into that state.

The stress is:

• онá
• беременна

So the stressed syllables are:

• на in она
• ре in беременна

A rough pronunciation guide:

• она ≈ a-NA
• беременна ≈ bye-RYE-men-na

That is only approximate, but it can help at first.

Also notice that Russian unstressed vowels are reduced, so the first о in она does not sound like a strong English o.

Because есть is not normally used as the present-tense equivalent of is in sentences like this.

For learners, the simple rule is:

• In the present tense, Russian usually says Она беременна
• Not Она есть беременна

Using есть here would sound unnatural, old-fashioned, or strongly emphatic in ways beginners do not need.

So the safe choice is:

• Она беременна

Она беременна is a normal, direct, neutral way to say it.

Depending on context, Russian also has softer or more euphemistic expressions, for example:

• Она в положении = She is expecting / She is in a delicate condition
• Она ждёт ребёнка = She is expecting a baby

But the original sentence is perfectly ordinary and not inherently rude. It is just direct.

Yes, if the context already makes it clear who you are talking about.

For example, in conversation, someone might simply say:

• Беременна

This can mean She’s pregnant or Pregnant, depending on the situation.

However, for learners, using the full sentence:

• Она беременна

is clearer and safer.