Does heaven exist? With well over 100,000 plus recorded and described spiritual experiences collected over 15 years, to base the answer on, science can now categorically say yes. Furthermore, you can see the evidence for free on the website allaboutheaven.org.

Available on Amazon
also on all local Amazon sites, just change .com for the local version (.co.uk, .jp, .nl, .de, .fr etc.)


This book, which covers Visions and hallucinations, explains what causes them and summarises how many hallucinations have been caused by each event or activity. It also provides specific help with questions people have asked us, such as ‘Is my medication giving me hallucinations?’.

Available on Amazon
also on all local Amazon sites, just change .com for the local version (.co.uk, .jp, .nl, .de, .fr etc.)

Observations placeholder

Occupational exposure of midwives to nitrous oxide on delivery suites



Type of Spiritual Experience



And what about the mother and baby?

A description of the experience

Occup Environ Med. 2003 Dec; 60(12): 958–961.
doi:  [10.1136/oem.60.12.958]
PMCID: PMC1740444
PMID: 14634189
Occupational exposure of midwives to nitrous oxide on delivery suites
K Henderson, I Matthews, A Adisesh, and A Hutchings
Author information Copyright and License information Disclaimer
This article has been cited by other articles in PMC.
Aims: To compare environmental and biological monitoring of midwives for nitrous oxide in a delivery suite environment.

Methods: Environmental samples were taken over a period of four hours using passive diffusion tubes. Urine measurements were taken at the start of the shift and after four hours.

Results: Environmental levels exceeded the legal occupational exposure standards for nitrous oxide (100 ppm over an 8 hour time weighted average) in 35 of 46 midwife shifts monitored. There was a high correlation between personal environmental concentrations and biological uptake of nitrous oxide for those midwives with no body burden of nitrous oxide at the start of a shift, but not for others.

Conclusions: Greater engineering control measures are needed to reduce daily exposure to midwives to below the occupational exposure standard. Further investigation of the toxicokinetics of nitrous oxide is needed.

The source of the experience


Concepts, symbols and science items



Science Items

Nitrous Oxide

Activities and commonsteps



These references are in PubMed. This may not be the complete list of references from this article.
Rowland AS, Baird DD, Weinberg CR, Shore DL, Shy CM, Wilcox AJ. Reduced fertility among women employed as dental assistants exposed to high levels of nitrous oxide. N Engl J Med. 1992 Oct 1;327(14):993–997. [PubMed]
Baird PA. Occupational exposure to nitrous oxide--not a laughing matter. N Engl J Med. 1992 Oct 1;327(14):1026–1027. [PubMed]
Hemminki K, Kyyrönen P, Lindbohm ML. Spontaneous abortions and malformations in the offspring of nurses exposed to anaesthetic gases, cytostatic drugs, and other potential hazards in hospitals, based on registered information of outcome. J Epidemiol Community Health. 1985 Jun;39(2):141–147. [PMC free article] [PubMed]
Ahlborg G, Jr, Axelsson G, Bodin L. Shift work, nitrous oxide exposure and subfertility among Swedish midwives. Int J Epidemiol. 1996 Aug;25(4):783–790. [PubMed]
Schumann D. Nitrous oxide anaesthesia: risks to health personnel. Int Nurs Rev. 1990 Jan-Feb;37(1):214–217. [PubMed]
Munley AJ, Railton R, Gray WM, Carter KB. Exposure of midwives to nitrous oxide in four hospitals. Br Med J (Clin Res Ed) 1986 Oct 25;293(6554):1063–1064. [PMC free article] [PubMed]
Newton C, Fitz-Henry J, Bogod D. The occupational exposure of midwives to nitrous oxide - a comparison between two labour suites. Int J Obstet Anesth. 1999 Jan;8(1):7–10. [PubMed]
Henderson KA, Matthews IP. An environmental survey of compliance with Occupational Exposure Standards (OES) for anaesthetic gases. Anaesthesia. 1999 Oct;54(10):941–947. [PubMed]
Trevisan A, Gori GP. Biological monitoring of nitrous oxide exposure in surgical areas. Am J Ind Med. 1990;17(3):357–362. [PubMed]
Sonander H, Stenqvist O, Nilsson K. Urinary N2O as a measure of biologic exposure to nitrous oxide anaesthetic contamination. Ann Occup Hyg. 1983;27(1):73–79. [PubMed]
Imberti R, Preseglio I, Imbriani M, Ghittori S, Cimino F, Mapelli A. Low flow anaesthesia reduces occupational exposure to inhalation anaesthetics. Environmental and biological measurements in operating room personnel. Acta Anaesthesiol Scand. 1995 Jul;39(5):586–591. [PubMed]
Imbriani M, Ghittori S, Pezzagno G. The biological monitoring of inhalation anaesthetics. G Ital Med Lav Ergon. 1998 Jan-Mar;20(1):44–49. [PubMed]
Gobba F, Ghittori S, Imbriani M, Maestri L, Capodaglio E, Cavalleri A. The urinary excretion of solvents and gases for the biological monitoring of occupational exposure: a review. Sci Total Environ. 1997 Jun 20;199(1-2):3–12. [PubMed]
Accorsi A, Barbieri A, Raffi GB, Violante FS. Biomonitoring of exposure to nitrous oxide, sevoflurane, isoflurane and halothane by automated GC/MS headspace urinalysis. Int Arch Occup Environ Health. 2001 Oct;74(8):541–548. [PubMed]