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It depend on the legal age of consent in the said country. If 16 is the legal age of consent in the said country, then it's not legally wrong to be pregnant at 16. But if the legal age of consent in the said country is 18, then the person that got the girl pregnant will be in trouble should the girl's family decide to report the incident to the authority.

18 years is the constitutional legal age of consent in my country and as a result, any man that gets a girl below 18 pregnant regardless of whether the girl consented or not, will be in great trouble should the girl's family report him to the police.