It had started with an argument between Doctor von Preussen and the Sergeant in charge of her security after he had received a radio transmission and had come back furious. Ernesto had hardly been able to understand the rapid-fire German that had gone back and forth. It had sounded like he had accused her of withholding information about something that Ernesto had been unable to catch. She had said that it was impossible, she hadn’t been with anyone since she had left Germany and that a mistake must have been made. Did she look like she was six-months along and wouldn’t she be the first to know? The Sergeant had turned and told her that he wasn’t alone in being tired of her constant lies and self-destructive behavior, so it didn’t matter what she was. The other three men present had agreed with that assessment. All of that was beside the point because with the Chileans coming. They were going back to Rio Gallegos that instant, and he was not going to listen to any more bullshit.
One of four things has occurred here:
1) Someone screwed up her medical back in Germany prior to her being deployed,
2) Someone has altered her blood test in Patagonia to get her recalled because she's making them look bad,
3) Someone has done the same thing to get her out of harms way or because they think she's going to self-destruct again,
4) Kiki and Ben's contraception methods weren't as effective as usual and she really is pregnant.
If the latter, it is possible for someone, even a doctor, to not realise that they are pregnant. Some pregnancies don't show. No morning sickness. Menstruation continues. Stress can mask the more typical signs. And Kiki had a pre-deployment medical that told her she wasn't pregnant, & she's faithful to her husband, so why would she even begin to think that she might be? Not to mention that the instant that she shows the slightest sign of being unwell, her entire regiment descends upon her to run every test currently known to medical science.