QuestionSBA
QuestionChoice
The formula for the calculation of the estimated delivery date is: first day of last menstrual period + 1 year − 3 months + 7 d. To calculate this with some accuracy, the patient needs to have had a regular cycle before this.
53022
a
1 June 2023
QuestionChoice
The formula for the calculation of the estimated delivery date is: first day of last menstrual period + 1 year − 3 months + 7 d. To calculate this with some accuracy, the patient needs to have had a regular cycle before this. The 1 May is 36 weeks of pregnancy.
53024
c
1 May 2023
QuestionChoice
The formula for the calculation of the estimated delivery date is: first day of last menstrual period + 1 year − 3 months + 7 d. To calculate this with some accuracy, the patient needs to have had a regular cycle before this. The 18 May is 38 weeks of pregnancy.
53026
e
18 May 2023
QuestionChoice
The formula for the calculation of the estimated delivery date is: first day of last menstrual period + 1 year − 3 months + 7 d. To calculate this with some accuracy, the patient needs to have had a regular cycle before this. The 25 May is incorrect since this does not include the 1 week added to reach the 40th week of pregnancy.
53023
b
25 May 2023
QuestionChoice
The formula for the calculation of the estimated delivery date is: first day of last menstrual period + 1 year − 3 months + 7 d. To calculate this with some accuracy, the patient needs to have had a regular cycle before this. The 25 June is 3 weeks after the estimated delivery date.
53025
d
25 June 2023
QuestionComment
surely just +9 months rather than + 12/12 - 3/12 - 7d
54492
QuestionComment
+7d ^
59759
User
subscriber
GIMP101
User
subscriber
hiney
QuestionComment
I actually don't even know why Naegelle's rule is so overhyped, just add 9 months and then 1 more week. Rather than that long +12 -3 months + 1 week.... 
56259
QuestionComment
I thought this, however it doesn't always work. 

For example, 

LMP = 30th November 2024

Using Naegele’s rule:
(30 Nov + 7 days) = 7 Dec
(7 Dec - 3 months) = 7 Sept
(7 Sept + 1 year) = 7 Sept 2025

Using your method:
(30 Nov + 9 months) = 30 Aug
(30 Aug + 1 week) = 6 Sept 2025
62129
User
subscriber
MM
User
subscriber
TheSecretSayer
Concept
Chapter
# Summary



A booking appointment is a comprehensive health assessment conducted before 10 weeks gestation to identify women who may require additional support throughout their pregnancy. It involves taking a detailed history and conducting various health checks and tests.


# Investigations


During a booking appointment, the following investigations are typically conducted:

- Comprehensive medical, psychiatric, surgical, obstetric, gynaecological and social histories
- Height, weight and BMI
- Urinalysis
- Blood pressure
- Blood tests for full blood count, blood group, rhesus status, red cell alloantibodies, blood borne viruses (HIV, syphilis, hepatitis B)
- Blood tests for sickle cell and thalassaemia if indicated

# Management


The booking appointment serves as an opportunity to discuss and plan management strategies for the pregnancy. This can include discussing ultrasound scans and other screening and diagnostic tests, as well as diet and supplements during pregnancy. Following the appointment, further testing and treatment may be planned as necessary to reduce the risk to the patient and fetus during pregnancy and labour.
99
139
Booking appointment (obstetrics)
Topic
38
Obstetrics
10665
The estimated delivery date can be calculated by adding one year, subtracting three months, and adding seven days to the first day of the last menstrual period.
Presentation
409
Normal pregnancy and antenatal care
UkmlaTopic
18
Obstetrics and gynaecology
A 30-year-old woman presents to her GP after a positive pregnancy test. She is happy about the pregnancy and wants antenatal advice and referral to the relevant secondary care services. She says the first day of her last menstrual period was the 25 August 2022. She has a regular 28-d cycle normally.

What is her estimated delivery date?
a