Length of pregnancy, type of delivery

Does induction increase my odds of having a cesarean?

Excluding scheduled cesareans from the table above, there were 11655 spontaneous labors and 3310 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	18	5	0	1	1	50%		17	4	19%
248	25	8	2	5	4	44%	1	20	4	17%	1
249	22	15	0	3	10	77%		19	5	21%
250	31	5	0	6	4	40%		25	1	4%
251	24	1	0	2		0%		22	1	4%
252	41	18	3	10	6	38%	2	31	12	28%	1
253	31	12	0	6	7	54%		25	5	17%
254	45	9	1	8	3	27%		37	6	14%	1
255	44	9	1	5	2	29%		39	7	15%	1
256	39	4	3	6	2	25%	1	33	2	6%	2
257	51	5	3	7	2	22%	2	44	3	6%	1
258	66	8	3	14	2	13%	2	52	6	10%	1
259	101	16	10	27	7	21%	6	74	9	11%	4
260	96	12	5	24	3	11%	3	72	9	11%	2
261	98	8	7	24	4	14%	3	74	4	5%	4
262	93	23	5	16	5	24%	3	77	18	19%	2
263	116	21	3	21	4	16%		95	17	15%	3
264	111	20	8	16	4	20%	6	95	16	14%	2
265	160	13	7	21	3	13%	5	139	10	7%	2
266	211	17	9	48	5	9%	5	163	12	7%	4
267	188	21	4	41	11	21%	3	147	10	6%	1
268	198	17	9	38	6	14%	8	160	11	6%	1
269	226	26	8	29	4	12%	7	197	22	10%	1
270	294	34	9	47	6	11%	4	247	28	10%	5
271	265	29	15	37	8	18%	12	228	21	8%	3
272	318	32	21	50	14	22%	11	268	18	6%	10
273	435	51	42	115	16	12%	36	320	35	10%	6
274	386	40	36	84	16	16%	33	302	24	7%	3
275	383	30	18	69	11	14%	11	314	19	6%	7
276	496	43	16	75	22	23%	15	421	21	5%	1
277	493	54	12	70	24	26%	8	423	30	7%	4
278	500	38	10	73	12	14%	6	427	26	6%	4
279	512	72	8	50	16	24%	5	462	56	11%	3
280	1039	111	27	133	37	22%	15	906	74	8%	12
281	631	53	6	81	10	11%	6	550	43	7%
282	554	63	11	82	17	17%	11	472	46	9%
283	530	50	8	81	18	18%	5	449	32	7%	3
284	494	62	9	93	24	21%	8	401	38	9%	1
285	513	68	1	84	17	17%	1	429	51	11%
286	527	69	7	97	27	22%	6	430	42	9%	1
287	576	74	7	151	31	17%	7	425	43	9%
288	455	68	8	128	34	21%	8	327	34	9%
289	374	44	8	109	22	17%	7	265	22	8%	1
290	375	56	4	118	34	22%	3	257	22	8%	1
291	272	44	6	96	21	18%	6	176	23	12%
292	214	42	0	95	15	14%		119	27	18%
293	194	24	2	75	13	15%	2	119	11	8%
294	159	43	2	79	30	28%	2	80	13	14%
295	96	16	2	59	13	18%	2	37	3	8%
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	17	6	1	6	4	40%	1	11	2	15%
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