Length of pregnancy, type of delivery

Does induction increase my odds of having a cesarean?

Excluding scheduled cesareans from the table above, there were 12159 spontaneous labors and 3370 inductions. 9% of the spontaneous labors ended in cesarean and 19% of the inductions ended in cesarean.

Some people have looked at these numbers, and the fact that there seems to be an increase in cesareans after 40W0D, and wondered if there's a correlation. In other words, do "timeline-based" inductions lead to increased cesareans? That analysis gets tricky, so I'll just post the numbers and let you decide yourself what's going on.

Day	Total			Following inductions				Following spontaneous labor
	Vaginal Births	Unscheduled Cesareans	Scheduled Cesareans	Vaginal Births	Unscheduled Cesareans	% Unscheduled Cesareans	Scheduled Cesareans	Vaginal Births	Unscheduled Cesareans	% Unscheduled Cesareans	Scheduled Cesareans
245	15	9	3	1	2	67%	3	14	7	33%
246	18	6	0	1	2	67%		17	4	19%
247	19	5	0	1	1	50%		18	4	18%
248	25	8	2	5	4	44%	1	20	4	17%	1
249	22	15	0	3	10	77%		19	5	21%
250	32	5	0	6	4	40%		26	1	4%
251	26	1	0	2		0%		24	1	4%
252	41	18	3	10	6	38%	2	31	12	28%	1
253	32	12	0	6	7	54%		26	5	16%
254	45	10	1	8	4	33%		37	6	14%	1
255	44	9	1	5	2	29%		39	7	15%	1
256	42	4	3	7	2	22%	1	35	2	5%	2
257	54	5	3	7	2	22%	2	47	3	6%	1
258	67	8	3	14	2	13%	2	53	6	10%	1
259	101	17	10	27	8	23%	6	74	9	11%	4
260	99	12	6	25	3	11%	3	74	9	11%	3
261	102	8	8	26	4	13%	4	76	4	5%	4
262	94	23	5	16	5	24%	3	78	18	19%	2
263	121	21	3	22	4	15%		99	17	15%	3
264	112	22	8	16	5	24%	6	96	17	15%	2
265	164	13	7	21	3	13%	5	143	10	7%	2
266	222	17	10	49	5	9%	5	173	12	6%	5
267	189	21	4	41	11	21%	3	148	10	6%	1
268	198	17	9	38	6	14%	8	160	11	6%	1
269	229	26	9	29	4	12%	8	200	22	10%	1
270	300	35	9	50	7	12%	4	250	28	10%	5
271	272	29	15	40	8	17%	12	232	21	8%	3
272	324	32	21	50	14	22%	11	274	18	6%	10
273	442	51	43	120	16	12%	37	322	35	10%	6
274	395	40	37	85	16	16%	34	310	24	7%	3
275	650	30	19	69	11	14%	12	581	19	3%	7
276	507	46	17	76	22	22%	16	431	24	5%	1
277	501	54	12	71	24	25%	8	430	30	7%	4
278	507	38	10	73	12	14%	6	434	26	6%	4
279	522	73	8	50	17	25%	5	472	56	11%	3
280	1063	112	29	135	37	22%	15	928	75	7%	14
281	643	57	6	82	12	13%	6	561	45	7%
282	566	65	11	83	18	18%	11	483	47	9%
283	547	50	8	83	18	18%	5	464	32	6%	3
284	506	62	9	94	24	20%	8	412	38	8%	1
285	520	68	1	85	17	17%	1	435	51	10%
286	533	69	7	97	27	22%	6	436	42	9%	1
287	593	75	7	155	31	17%	7	438	44	9%
288	463	70	8	132	34	20%	8	331	36	10%
289	385	45	9	114	22	16%	7	271	23	8%	2
290	383	60	4	120	36	23%	3	263	24	8%	1
291	278	46	6	97	21	18%	6	181	25	12%
292	218	43	0	96	16	14%		122	27	18%
293	197	24	2	77	13	14%	2	120	11	8%
294	160	44	2	79	30	28%	2	81	14	15%
295	99	17	2	60	14	19%	2	39	3	7%
296	55	12	1	27	9	25%	1	28	3	10%
297	36	13	0	13	8	38%		23	5	18%
298	18	4	0	8	1	11%		10	3	23%
299	18	6	1	6	4	40%	1	12	2	14%
300	12	2	0	3	1	25%		9	1	10%

Due Date Survey Data Due date statistics: A study on the length of pregnancy Probability of delivery resulting from spontaneous labor after 35 weeks Probability of delivery within x days of a given date Length of pregnancy by week Spontaneous labor and due date determination Length of pregnancy, comparing subsequent births for individual moms Length of pregnancy for first time vs. second & third time moms Length of pregnancy, type of delivery Gestation vs. Birthweight Probablity of Induction after a given day Average day of spontaneous labor vs. age of mother at time of birth Are more babies born during a full moon? What's the most common day of the week for babies to be born? I'm still pregnant at 40W. What's it mean? Do winter babies arrive later? What if I know my conception date? Are boys or girls born later? Subsequent pregnancy date search How do inductions bias the due date statistics? Download the data Birth Stories Survey input dates

More Resources Pregnancy Day-by-Day Fast pregnancy calendar Baby age calendar EDD Icon Generator Jo's Birth Story Weeks vs. Months Explained Charts generated by flot spacefem.com spacefem@spacefem.com