schwanger
pregnant
Describing the state in which a woman or female animal is carrying one or more offspring in the body.
Meine Schwester ist im fünften Monat schwanger.
My sister is five months pregnant.

pregnant
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pregnant
Describing the state in which a woman or female animal is carrying one or more offspring in the body.
Meine Schwester ist im fünften Monat schwanger.
My sister is five months pregnant.

You can always recognize the figurative meaning of 'schwanger gehen' (to be contemplating) by the fixed combination with the preposition 'mit' and an abstract noun such as 'Idee' (idea), 'Plan' (plan), or 'Gedanke' (thought).
Sie geht schon lange mit dem Gedanken schwanger, auszuwandern.
She has long been contemplating the idea of emigrating.
In the literal sense, 'schwanger' (pregnant) is often used with time expressions or the preposition 'von' (by/from). You are 'im [Zahl]. Monat schwanger' (in your [number] month of pregnancy) or 'von jemandem schwanger' (pregnant by someone).
Sie ist im dritten Monat schwanger.
She is three months pregnant.
Common verbs in this context are 'schwanger werden' (to become pregnant) for the beginning of the state and 'schwanger sein' (to be pregnant) for the ongoing state.
Viele Paare wünschen sich, schwanger zu werden.
Many couples wish to become pregnant.
The expression 'mit etwas schwanger gehen' (to be contemplating something) is a fixed unit. It describes keeping an idea or plan to yourself for a long time and thinking about it before acting.
Der Autor ging zwei Jahre mit der Idee für seinen neuen Roman schwanger.
The author contemplated the idea for his new novel for two years.
circumstance
'in anderen Umständen sein' (to be expecting) and 'schwanger' both refer to the same state. 'schwanger' is the normal, direct word and fits in almost all situations, including at the doctor’s or in everyday life. 'in anderen Umständen sein' is a euphemistic and rather old-fashioned expression. Today it often sounds old-fashioned or very cautious. If you want to speak clearly and naturally, you usually use 'schwanger'.

Anna ist schwanger und hat nächste Woche einen Termin bei der Ärztin.
Anna is pregnant and has an appointment with the doctor next week.
Meine Großmutter sagte früher, eine Frau sei in anderen Umständen.
My grandmother used to say that a woman was “in other circumstances.”