We, as biological organisms, eperience variation in every aspect of our existence - metabolic rate, eyesight, height, need for x number of hours of sleep at night, appetite, sex drive - so how would we not experience variation in a physiological process as complicated as labor and childbirth?
Due dates are based on a 40 week gestational period, from Henci Goer via Lamaze.org:
"A major conceptual problem with routine induction at 41 weeks is that the median length of pregnancy in healthy first-time mothers is 41 weeks 1 day. The conventional 40 weeks is just that: a convention. It is based on nothing more than a German obstetrician's fiat two centuries ago that since women cycle according to the moon, pregnancy lasts 10 moon months, that is, 10 months of 4 weeks each. Practitioners may argue over how great a deviation from normal warrants intervention, but in the case of routine induction at 41 weeks, they are arguing for intervening when there is no deviation from normal. The same study that reported a 41 week 1 day median pregnancy length in primiparous women found a 40 week 3 day average pregnancy length in women who had had babies before. First-time mothers are notoriously more likely to have problem labors and cesarean sections than multiparous women. This means that the increasing complication rates and cesarean rates seen with advancing gestational length may well be nothing more than an artifact created by having a higher and higher proportion of primiparous women in the mix as the days roll by after 40 weeks.
Practice philosophy aside, a policy of routine induction at 41 weeks produces more than a conceptual problem. Primiparous women have roughly double the risk of having an induced labor end in a c-section. A policy of routine induction at 41 weeks exposes large numbers of a vulnerable population to a greatly heightened risk of surgical delivery with all of the attendant problems of a major operation as well as all the future reproductive consequences of having a uterine scar. In addition, crowding the labor ward with women undergoing an unnecessary intervention means there may be no room for a woman who really needs care. In their paper criticizing routine 41-week induction, Menticoglou and Hall (2002) cite a case where admission was delayed for a pregnant woman requiring IV antihypertensive drugs for severe hypertension because no beds were available. Several were filled with women undergoing routine 41-week inductions. The woman died of a stroke before she could be admitted. To quote Menticoglou and Hall's conclusion: “Routine induction at 41 weeks is ritual induction at term, unsupported by rational evidence of benefit. It is unacceptable, illogical and unsupportable interference with a normal physiologic situation.”
With DD, my OB suggested inducing me at 39 weeks - with no jusitifcation/reason provided. So, I stopped answering the phone and ignored my appointments. Labor started spontaneously and DD was born 41w3d with no problems.
I'm just sayin'.
-Xen
Due dates are based on a 40 week gestational period, from Henci Goer via Lamaze.org:
"A major conceptual problem with routine induction at 41 weeks is that the median length of pregnancy in healthy first-time mothers is 41 weeks 1 day. The conventional 40 weeks is just that: a convention. It is based on nothing more than a German obstetrician's fiat two centuries ago that since women cycle according to the moon, pregnancy lasts 10 moon months, that is, 10 months of 4 weeks each. Practitioners may argue over how great a deviation from normal warrants intervention, but in the case of routine induction at 41 weeks, they are arguing for intervening when there is no deviation from normal. The same study that reported a 41 week 1 day median pregnancy length in primiparous women found a 40 week 3 day average pregnancy length in women who had had babies before. First-time mothers are notoriously more likely to have problem labors and cesarean sections than multiparous women. This means that the increasing complication rates and cesarean rates seen with advancing gestational length may well be nothing more than an artifact created by having a higher and higher proportion of primiparous women in the mix as the days roll by after 40 weeks.
Practice philosophy aside, a policy of routine induction at 41 weeks produces more than a conceptual problem. Primiparous women have roughly double the risk of having an induced labor end in a c-section. A policy of routine induction at 41 weeks exposes large numbers of a vulnerable population to a greatly heightened risk of surgical delivery with all of the attendant problems of a major operation as well as all the future reproductive consequences of having a uterine scar. In addition, crowding the labor ward with women undergoing an unnecessary intervention means there may be no room for a woman who really needs care. In their paper criticizing routine 41-week induction, Menticoglou and Hall (2002) cite a case where admission was delayed for a pregnant woman requiring IV antihypertensive drugs for severe hypertension because no beds were available. Several were filled with women undergoing routine 41-week inductions. The woman died of a stroke before she could be admitted. To quote Menticoglou and Hall's conclusion: “Routine induction at 41 weeks is ritual induction at term, unsupported by rational evidence of benefit. It is unacceptable, illogical and unsupportable interference with a normal physiologic situation.”
With DD, my OB suggested inducing me at 39 weeks - with no jusitifcation/reason provided. So, I stopped answering the phone and ignored my appointments. Labor started spontaneously and DD was born 41w3d with no problems.
I'm just sayin'.

-Xen







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