"Card companies are reluctant to lend to riskier borrowers just as anyone else might be reluctant to lend even to a brother or a sister if they don't think that that brother or sister can repay that loan, " she says.

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Behind every American in uniform stands a wife, a husband, a mom, a dad, a son or a daughter, a sister or brother.

WHITEHOUSE: Joining Forces to Support Military Families

It is a particular gamble if the child is conceived partly to provide a bone marrow graft for a brother or sister with a nasty genetic disease: not only might the new baby turn out be a poor match for transplantation, but might also have inherited the same disorder as his or her sibling.

ECONOMIST: Gene genies

Saviour siblings are babies born because they are a tissue match for a sick older brother or sister with a genetic condition.

BBC: Embryology Bill: The key points

But then that day, if they get home and like they don't have any friends over or a brother isn't there or a sister isn't there or things like that, they could just go up to their room and cry because it really hurts on the inside.

NPR: Documentary Examines Misconceptions About American Boys

I'm also pregnant as I write this and I hope and pray that everything will go well a second time and we will be lucky enough to have a brother or sister for Emily.

BBC: NEWS | UK | Losing a baby: Your experiences

The baby, thought to be due in November, will provide her five-year-old son Cameron with a brother or sister.

BBC: Ulrika Jonsson pregnant

It also found that 38% of children were being brought up by a sister or brother.

BBC: Parent walking with two children

And so as we make that decision, I would hope that people wouldn't take the easy way out, which is to say let me vote for him because I want to see a brother get in or let me vote for her because I want to see a sister get in.

NPR: A Local Perspective on the South Carolina Vote

The dependent must be your child, stepchild, adopted child, foster child, brother or sister, or a descendant of one of these.

FORBES: Bringing Up Baby: Moms, Kids and Taxes

As a result, the bond of love between Jude and Sue (Kate Winslet) seems more like an endurance trial, or the difficult rapport of a brother and sister.

NEWYORKER: Jude

There is a strong genetic link - a baby is 30-40 times more likely to develop cleft lip and palate if their elder brother or sister was also born with the condition.

BBC: Folic acid 'cuts cleft palate risk'