If you're a fan of her famous family, then we probably don't need to tell you that Jana Duggar is single.
An unattached, 29-year-old woman is a virtually unheard-of phenomenon in the Duggars' community -- a culture in which women are taught from a young age that procreation is their primary reason for being.
When Jana's twin brother, John David Duggar, married Abbie Burnett back in November, Jana became the only unmarried Duggar over the age of 20.
Her love life is obviously her own business, but given the extent to which the Duggars have shared every aspect of their lives with television viewers, it stands to reason that fans would be curious as to why Jana hasn't started a family of her own.
And in recent months, some interesting theories have emerged as part of the effort to understand why a young woman who's so thoroughly committed to her parents' worldview in virtually every respect would stray in this one important way.
Take a look:
All The Single Ladies
If you took a photo of all the single Duggar women, it would look something like this. Jana has four sisters over the age of 18, and they're all married moms.
Duggar Baby Boom
In fact, several Duggar women are currently expecting, including Jana's cousin Amy and her sister-in-law Lauren.
Single and ... Loving It?
Along with their religious practices, child-rearing is one of the two cornerstones of the Duggar way of life, and to many fans, it seems strange that a woman who seems to be so good with children would choose to hold off on having any of her own.
Out Standing In Her Field
So why is Jana still single? Well, it's a question that only she can answer (and it's possible she may not know, herself!), but that hasn't prevented many, many fans from taking a crack at it.
Perhaps as a result of the current baby boom, the matter has seen a resurgence of interest in recent months. Here are the most popular theories on the Duggar-obsessed corners of the internet.
1. Jana Is Gay
Obviously, this is one of the more controversial theories, but its proponents say there's plenty of evidence to back it up.