I think I was clear in saying that no one has a right.
But I agree that, like anything else in society, it is important for us to administrate our duties fairly.
The model I'd like to propose is the following one (and I agree that we do not yet have the technology to implement it, but we are close). Each individual is sterilized before fertility. To have a child, you have to apply much the way we apply for a driver's license. You have to show the completion of a parenting course and agree to the financial burden of a child.
A background check is performed to determine that the parents in question are a) not convicted of certain serious crimes (like child abuse), b) not currently receiving government welfare (presumptively able to pay for the child). Then you can have a child, either by temporarily reversing the sterility procedure (removing a block, etc) or through a simple in vitro implantation using gametes removed earlier and held in trust by the government, whatever's easiest.
The prevention of unintended pregnancies alone would be a major boon for society.
According to Custodial Mothers and Fathers and Their Child Support: 2005, released by the U.S. Census Bureau in August, 2007, there are approximately 13.6 million single parents in the United States today, and those parents are responsible for raising 21.2 million children (approximately 26% of children under 21 in the U.S. today).
So what's the "average" single parent really like? According to the U.S. Census Bureau...
She is a Mother:
* Approximately 84% of custodial parents are mothers, and
* 16% of custodial parents are fathers
She is Divorced or Separated:
Of the mothers who are custodial parents:
* 44% are currently divorced or separated
* 33% have never been married
* 22% are married (In most cases, these numbers represent women who have remarried.)
* 1% were widowed
Of the fathers who are custodial parents:
* 57% are divorced or separated
* 24% are currently married (In most cases, these numbers represent men who have remarried.)
* 18% have never married
* 1% were widowed
She is Employed:
* 79% of custodial single mothers are gainfully employed
50% work full time, year round
29% work part-time or part-year
* 92% of custodial single fathers are gainfully employed
74% work full time, year round
18% work part-time or part-year
She and Her Children Do Not Live in Poverty:
* 27.7% of custodial single mothers and their children live in poverty
* 11.1% of custodial single fathers and their children live in poverty
She Does Not Receive Public Assistance:
* 31% of all single parents receive public assistance
* Only 6% of single parents receive TANF (Temporary Assistance for Needy Families)
http://singleparents.about.com/od/legalissues/p/portrait.htm